February 17, 2025
Glossary
Subject Line – The text displayed in the recipient’s inbox that determines whether they open the email.
Open Rate – The percentage of email recipients who open a given email.
Click-Through Rate (CTR) – The percentage of recipients who clicked on one or more links in the email.
FOMO (Fear of Missing Out) – A psychological trigger used in marketing to encourage quick action.
Segmentation – Dividing an email list into smaller groups based on demographics, behavior, or other data.
Personalization Token – A piece of code in email platforms used to insert personalized information like the subscriber’s name.
A/B Testing – Comparing two versions of an email to see which performs better based on metrics like open rate or CTR.
Table of contents
How to Craft Email Subject Lines That Actually Get Clicked
The ROI Power of a Great Subject Line
Email marketing can produce a return on investment of $42 for every $1 spent. But that potential depends heavily on a single factor: whether people open your emails. A compelling subject line is the entry point. It determines if your audience engages or ignores you. Let’s explore how to write subject lines that drive results.
Key Elements of High-Performing Subject Lines
1. Timeliness & Urgency
People respond to immediacy. Urgent subject lines create a sense of limited opportunity, compelling recipients to act fast.
Examples:
- “Only 24 Hours Left: Save Big”
- “Flash Sale Ends at Midnight”
- “New Arrivals Just Dropped”
2. Personalization
Generic messages don’t perform. Using names, behavior, and interests makes your subject lines feel tailored.
Examples:
- “[First Name], You Left Something Behind”
- “Found Something Perfect for Your Style”
- “Still Thinking About That Cart?”
Stat: Personalized subject lines can boost open rates by up to 26%.
3. Make an Offer
Lead with value. Your audience needs a reason to open your email. Offers, discounts, and incentives grab attention.
Examples:
- “Free Shipping on Orders Over $50”
- “Buy One, Get One Free Today Only”
- “VIPs Save 20% This Weekend”
4. Spark Curiosity
Teasing content without giving it away builds intrigue. Use mystery to make recipients want to learn more.
Examples:
- “This One Product Changed Everything”
- “The Secret Is Finally Out”
- “What’s Inside Might Surprise You”
Practical Subject Line Writing Tips
1. Keep It Concise
Stay under 60 characters or go over 70. Subject lines in the 60–70 character “dead zone” tend to perform poorly.
Best practice: Mobile users typically see only the first 35–50 characters.
2. Be Straightforward
Avoid overly clever phrasing. The clearer your message, the better.
Examples:
- “50% Off Ends Tonight”
- “New Collection Just Landed”
3. Create Exclusivity
Make your audience feel special. Use phrases that imply insider status or early access.
Examples:
- “Early Access for Subscribers Only”
- “You’re on the List—Sneak Peek Inside”
4. Avoid ALL CAPS and Over-Punctuation
These can trigger spam filters or look unprofessional.
Do: “Final Hours: 25% Off”
Don’t: “HURRY!!! ACT NOW!!!”
5. Use Humor Thoughtfully
Humor builds connection but must match your brand voice.
Examples:
- “Oops, We Did It Again”
- “No Tricks. Just 20% Off.”
6. Ask a Question
Questions spark engagement. Make sure your email answers it.
Examples:
- “Is Your Routine Missing This?”
- “Looking for a Summer Refresh?”
Bonus Strategies to Optimize Subject Lines
A/B Test Everything
Test variables like tone, personalization, and structure. Evaluate performance by open rates, but prioritize CTR and conversions.
Align with Preheader Text
Ensure the subject line and preheader complement one another. Use the preheader to build curiosity or reinforce your offer.
Match Subject Line to Landing Page
Avoid misleading or clickbait subject lines. Your email and destination page should work together to deliver on the subject line’s promise.
Table: Subject Line Formats That Convert
| Type | Example | Use Case |
|---|---|---|
| Urgency | “Last Chance: 20% Off Ends Tonight” | Flash sale or expiring deal |
| Personalization | “[First Name], Here’s Your Weekly Pick” | Weekly update or curated content |
| Offer | “Get Free Shipping All Week Long” | Ongoing promotion |
| Curiosity | “We Weren’t Expecting This…” | New launch or surprise |
| Question | “Want to Save on Your Next Order?” | Coupon or loyalty program |
Frequently Asked Questions
Q1: How often should I test new subject lines?
A: At least once per campaign. Run A/B tests with every major email send.
Q2: Does adding emojis improve open rates?
A: Emojis can increase open rates when used sparingly and appropriately, but they don’t work for every audience.
Q3: Should I personalize every subject line?
A: Not always, but personalization can improve open rates significantly. Use it strategically.
Q4: What’s a good open rate benchmark?
A: Industry average ranges between 18%–25%. This varies by niche and list quality.
Q5: What’s better—curiosity or clarity?
A: Depends on your audience. Curiosity can drive opens, but only if it connects to relevant content.
Q6: How long should subject lines be?
A: Under 60 characters is ideal. Keep mobile readers in mind.
Ready to supercharge your email marketing strategy? Blossom Ecom helps DTC brands write emails that get opened—and clicked. Let’s make your inbox presence impossible to ignore.
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<p>Glossary of Terms Term Definition Klaviyo An email and SMS marketing platform designed for eCommerce brands to automate, personalize, and analyze customer communication. Automation Flow A sequence of pre-set messages triggered by specific user actions like purchases, form fills, or cart abandons. Segmentation The act of dividing your email/SMS list into groups based on behavior, […]</p>
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Email Marketing Management for eCommerce: A Real Guide
<p>Glossary of Key Email Marketing Terms Term Definition Email Marketing Management The process of planning, executing, analyzing, and optimizing email campaigns and automations to meet business objectives. Campaign A one-time email blast sent to a list or segment, typically tied to a specific event or offer. Automation (Flow) A pre-configured series of emails triggered by […]</p>
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Email Marketing 101: How to Create Emails That Convert
<p>Glossary of Key Email Marketing Terms Term Definition CTA (Call-to-Action) A button or link prompting users to take a specific action like “Buy Now” or “Read More.” Click-Through Rate (CTR) The percentage of email recipients who clicked on one or more links in your email. Open Rate The percentage of recipients who opened your email. […]</p>
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Shopify Email Marketing: Campaigns + Automations That Actually Grow Sales
<p>Glossary of Key Email Marketing Terms for Shopify Merchants Why Shopify Email Marketing is a Non-Negotiable in 2025 Email isn’t dead—it’s your most profitable channel. It’s not just for pushing out promos; it’s your always-on sales engine. Here’s why email is mandatory: Metric Performance ROI $36 for every $1 spent Open Rates (Transactional) 50–80% Cart […]</p>
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7 eCommerce Trends to Watch in 2025
<p>Glossary Term Definition M-commerce Mobile commerce, or shopping via smartphones and tablets. AI (Artificial Intelligence) Technology enabling automated learning and decision-making. Social Commerce Shopping directly on social media platforms like Instagram or TikTok. Personalization Tailoring content or offers based on individual user data or behavior. Visual Commerce Using interactive visuals, AR, or UGC to improve […]</p>
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The Complete Guide to Winning at B2B eCommerce in 2025
<p>Glossary Term Definition AOV (Average Order Value) The average dollar amount spent per order. CLV (Customer Lifetime Value) The projected revenue from a customer over the entire relationship. ERP (Enterprise Resource Planning) Software for managing daily business operations. CRM (Customer Relationship Management) Software used to manage customer data and relationships. Net Terms Payment terms that […]</p>
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Answering YOUR Email Marketing Questions
<p>Glossary Term Definition GDPR A regulation protecting personal data and privacy in the EU. CAN-SPAM A US law governing commercial email and ensuring recipients can opt out. Open Rate Percentage of recipients who open your email. CTR (Click-Through Rate) Percentage of people who click a link inside the email. A/B Testing Sending two versions of […]</p>
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What Is Email Marketing and Why Does It Work So Well?
<p>Glossary Term Definition CTR (Click-Through Rate) Percentage of recipients who clicked a link in your email. ESP (Email Service Provider) A platform for creating, sending, and managing email campaigns. Segmentation Dividing your email list into groups based on behavior or demographics. Personalization Tailoring content to individual subscribers using their data. Automation Triggered emails sent based […]</p>
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5 Steps Toward a Successful Email Marketing Campaign
<p>Glossary Term Definition CTR (Click-Through Rate) The percentage of email recipients who clicked on a link in the email. A/B Testing Comparing two versions of an email to see which performs better. ESP (Email Service Provider) A platform like Klaviyo or Mailchimp that helps manage email campaigns. Responsive Design An email layout that adapts to […]</p>
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8 Proven Strategies to Build Your Email Marketing Lists in 2025
<p>Glossary Term Definition ESP (Email Service Provider) A platform used to manage, send, and track email marketing campaigns. Gated Content Valuable digital content made accessible only after providing an email address. UGC (User-Generated Content) Content created and shared by users that promotes a brand organically. CTA (Call-to-Action) A prompt in marketing encouraging a specific action, […]</p>
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How to Supercharge Your Social Media with Email Marketing
<p>Glossary Term Definition Email Campaign A structured email message sent to a list with a specific goal. CTA (Call-to-Action) A prompt encouraging recipients to take an action (e.g., click, follow). UGC (User-Generated Content) Content created by customers and shared on social media. Referral Program A system offering rewards for customers who refer others to a […]</p>
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The No-B.S. Guide to Ecommerce Email Marketing
<p>Glossary Term Definition ROI (Return on Investment) The profit gained from email campaigns relative to cost. CTA (Call-to-Action) A prompt in an email encouraging users to take a specific action. Segmentation Dividing your email list into groups based on behaviors or attributes. Flows Automated emails triggered by customer actions or milestones. Campaigns One-off email blasts […]</p>
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How Email Can Power Your Customer Loyalty
<p>Glossary Term Definition First-Party Data Data collected directly from customer interactions with your brand. Zero-Party Data Information that customers willingly share, such as quiz results or preferences. Dynamic Content Personalized content that adapts based on user behavior or profile. Milestone Campaign Automated emails triggered by key customer events or achievements. Email Flow A series of […]</p>
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How Much Does Email Marketing Cost in 2025?
<p>Glossary Introduction Email marketing isn’t just an optional add-on to your digital strategy—it’s foundational. But the question every eCommerce operator has: How much does it really cost to run effective email campaigns? The answer? It depends. In this guide, we’ll unpack every factor influencing your email marketing costs, from platform fees to creative execution. We’ll […]</p>
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Email Marketing 101: How to Create Emails That Convert
<p>Glossary of Key Email Marketing Terms Term Definition CTA (Call-to-Action) A button or link prompting users to take a specific action like “Buy Now” or “Read More.” Click-Through Rate (CTR) The percentage of email recipients who clicked on one or more links in your email. Open Rate The percentage of recipients who opened your email. […]</p>
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Create a Winning Welcome Email Strategy
<p>Your Welcome Email Cheat Sheet ✅️ Welcome Email Strategy: A series of automated emails sent to new subscribers post-signup. ✅️ Open Rate: The percentage of recipients who opened your email. ✅️ CTR (Click-Through Rate): The percentage of recipients who clicked a link inside your email. ✅️ CTA (Call to Action): A direct instruction (button or […]</p>
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How to Revitalize Your eCommerce Sales in the New Year
<p>Glossary Introduction January isn’t just about resolutions—it’s a strategic window for ecommerce growth. Customers are energized by a fresh start and looking for brands that align with their goals. By leveraging New Year momentum, brands can attract, engage, and retain more customers. This guide breaks down five high-impact strategies (plus a bonus optimization tip) to […]</p>
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Customer Survey Emails: Finding the REAL Reason People Aren’t Buying
<p>📃 Glossary of Terms Term Definition Customer Survey Email A message sent to customers requesting feedback via a questionnaire, often linked to a form. Response Rate The percentage of recipients who complete the survey out of the total who received the email. Buyer Persona A fictional representation of your ideal customer based on data and […]</p>
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E-commerce Email Marketing: Dos, Don’ts, and Essential Tips for CBD Brands
<p>E-commerce Email Marketing has become a crucial tool for businesses looking to engage customers, drive conversions, and build lasting relationships with their audience. Quick Reference Guide ✅ Email FlowA series of automated emails triggered by specific user actions (e.g., signing up, purchasing, abandoning cart). ✅ CTR (Click-Through Rate)The percentage of recipients who clicked on at […]</p>
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The Ultimate Crash Course Email Marketing for E-commerce Store
<p>Email Marketing for E-commerce stores is one of the best ways to grow your business these days. 🔍 Quick Reference Guide ✅ Email FlowAn automated sequence of emails triggered by customer actions (e.g., signup, purchase, cart abandonment). ✅ Trigger-Based EmailAn email sent based on a specific event, like a user abandoning a cart or signing […]</p>
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3 Retention Metrics You’re Measuring Incorrectly + Strategies to Fix Them
<p>Tracking these 3 retention metrics will provide valuable insights into customer loyalty and help you refine strategies to boost long-term business growth. Glossary of Terms Term Definition RPR (Repeat Purchase Rate) The percentage of customers who make a second purchase after their first. CLV / LTV (Customer Lifetime Value) The total gross margin (not revenue) […]</p>
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How to Measure the Success of Your Email Marketing Strategy
<p>An effective email marketing strategy is essential for growing your brand, increasing engagement, and driving conversions through personalized and targeted campaigns. Glossary of Terms Term Definition CRM Customer Relationship Management – the system and strategy for managing customer interactions and data. CLV Customer Lifetime Value – the total revenue a customer generates over their relationship […]</p>
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How to Run A/B Tests in Email Marketing
<p>A/B tests in email marketing allow you to experiment with different elements to refine your campaigns and achieve higher engagement and better results. Glossary of Terms (Quick Reference) Term Definition A/B Testing Comparing two email versions to measure performance of a single variable Conversion Rate (CVR) % of users who take a desired action (e.g. […]</p>
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9 Pillars of Email Marketing Success
<p>Mastering the 9 pillars of email marketing is crucial to running successful campaigns that drive engagement, conversions, and lasting customer relationships. Glossary of Email Marketing Term Term Definition ESP Email Service Provider (like Klaviyo, Mailchimp, or ActiveCampaign) Flows Automated email sequences triggered by behavior (e.g., sign-up, purchase) AOV Average Order Value CLV Customer Lifetime Value […]</p>
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Rethink Customer Loyalty: 7 game-changing strategies to retain customers
<p>Implementing 7 game-changing strategies to retain customers can foster loyalty and build long-term relationships that benefit your business. 🔍 Glossary of Terms Term Simple Definition Customer Retention Keeping customers coming back to buy again instead of losing them. LTV (Lifetime Value) How much money a customer is expected to spend with your brand over time. […]</p>
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Good Email Marketer vs Bad Email Marketer
<p>Understanding the key differences between a good email marketer and a bad one can help refine your strategies and achieve higher engagement and conversions. 🔍 Glossary of Terms Term Definition CAC Customer Acquisition Cost: What it costs to acquire one paying customer CLV / LTV Customer Lifetime Value: Revenue expected from one customer over their […]</p>
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What is MMS and Why You Should Start Now
<p>Glossary: Key MMS Marketing Terms Term Definition MMS (Multimedia Messaging Service) A messaging protocol that supports the delivery of images, videos, audio, and rich text via mobile SMS (Short Message Service) Traditional text messages limited to 160 characters and no media support CTIA The U.S. wireless industry’s trade group, regulating best practices for SMS/MMS marketing […]</p>
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Why SMS is the Marketing Channel of the Future
<p>SMS marketing is quickly becoming the go-to channel for businesses due to its high engagement rates, instant delivery, and direct connection with customers. Quick Glossary: SMS Marketing Terms You Need to Know Term Definition SMS Short Message Service – 160-character text-based messages sent to mobile phones MMS Multimedia Messaging Service – allows sending images, videos, […]</p>
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EDM Marketing vs Email Marketing: What’s the Difference?
<p>EDM Marketing Vs Email Marketing are often used interchangeably, but they have distinct differences that can impact your marketing strategy. Quick Reference: Key Terms & Definitions Term Definition EDM Marketing Electronic Direct Mail – a campaign-based strategy built around personalized, segmented, and behavior-driven email content Email Marketing A broader communication strategy using email to deliver […]</p>
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Case Study: How Smart Klaviyo Email Segmentation Boosted Conversions by 323%
<p>Klaviyo email segmentation helps you send tailored campaigns that resonate with customers and significantly boost engagement and conversions. Key Concepts to Know Term What It Means Segmentation Breaking your list into smaller groups based on behavior, lifecycle, or demographics Deliverability Your ability to land in the inbox—not spam Modular Email Design Template system using reusable, […]</p>
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6 Marketing Strategies to Future-Proof Your Marketing
<p>These 6 marketing strategies will help you boost business growth, enhance visibility, and drive customer engagement. Foundational Terms Term Definition Zero-Party Data Data explicitly shared by customers (e.g. quiz answers, preferences) RFM Modeling Scoring model based on Recency, Frequency, and Monetary value of purchases First-Party Data Behavioral data collected directly (e.g. site visits, email opens) […]</p>
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Mastering Klaviyo Email Design: 11 Tips That Actually Work
<p>Klaviyo email design allows you to create visually stunning campaigns that boost engagement and improve conversion rates. 🔍 Understanding the Terms ✅ KlaviyoA leading email and SMS marketing platform built for eCommerce businesses (especially Shopify, WooCommerce, and BigCommerce). ✅ CTA (Call-to-Action)A button or link that directs a user to take an action (e.g., “Buy Now,” […]</p>
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How to Customize Shopify Email Templates Quickly and Efficiently
<p>Glossary of Email Design & Shopify Terms Term Definition Liquid Shopify’s open-source template language used to pull dynamic data into emails (e.g., {{ customer.first_name }}). MJML (Mailjet Markup Language) A framework that simplifies the creation of responsive, cross-client HTML emails. React Email A modern way to code dynamic, component-based emails using React syntax. Email Client […]</p>
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The Next Frontier of E-Commerce: What’s Coming and How to Prepare
<p>The frontier of e-commerce is marked by innovative technologies and trends that are revolutionizing the future of online retail. Glossary of Terms Term Definition AI (Artificial Intelligence) Computer systems that mimic human intelligence to automate decision-making and improve personalization. Machine Learning A subset of AI where systems learn from data patterns to improve future performance—used […]</p>
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Three Steps to Increasing Your Marketing Email Open Rates
<p>Glossary of Email Marketing Terms Term Definition Open Rate The percentage of recipients who open your email. Calculated by (unique opens ÷ total delivered emails) × 100. Sender Reputation A score assigned by inbox providers (like Gmail) based on your sending habits, list health, and engagement. Segmentation Breaking your email list into sub-groups based on […]</p>
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Best Practices for Optimizing Email Flows with Klaviyo
<p>Optimizing email flows with Klaviyo helps streamline automation, increase engagement, and improve conversions through tailored email strategies. Glossary of Terms Term Definition Email Flow A series of automated emails triggered by customer behavior (e.g. abandoned cart, post-purchase, signup). Segmentation Grouping your subscribers based on shared traits or actions to send more targeted messages. Dynamic Content […]</p>
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Email Marketing ROI: The Most Reliable Revenue Engine You’re Not Fully Using
<p>Quick Reference Guide Email Marketing ROI ✅ Email FlowAn automated sequence triggered by a customer action (e.g., signup, purchase, abandonment). ✅ CTR (Click-Through Rate)The percentage of recipients who click a link in your email. ✅ Open RatePercentage of recipients who opened your email. ✅ SegmentationDividing your list into smaller groups based on behavior, demographics, or […]</p>
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Conquering the Gmail Inbox: How to Keep Your Emails Out of the Junk Folder
<p>Conquering the Gmail Inbox is key to boosting productivity with effective email organization, sorting, and management techniques. Understanding the Terms ✅ Email DeliverabilityThe ability of an email to land in a subscriber’s inbox instead of the spam folder. ✅ SPF (Sender Policy Framework)A DNS record that verifies which servers are allowed to send email on […]</p>
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Refreshed Blog: “SMS Marketing for E-commerce: A Straightforward Guide”
<p>SMS Marketing for e-commerce is a powerful tool to engage customers instantly, increase conversions, and create personalized experiences that drive sales. 🔍 Glossary of Terms Term Definition SMS (Short Message Service) Text-only messages up to 160 characters sent to a user’s phone. MMS (Multimedia Messaging Service) Text messages that include images, videos, GIFs, or audio. […]</p>
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