Home E-commerce 5 Email Marketing Tips for Online Shops to Boost Sales

5 Email Marketing Tips for Online Shops to Boost Sales

August 03, 2026
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Are you running an online shop, busy every day running ads on Facebook and Google, then posting on social media, but sales are still sluggish? Have you ever wondered: have I fully utilized the power of email marketing? While everyone is rushing to buy paid advertising, email quietly brings huge profits to those who know how to use it.

According to many studies, email marketing accounts for about 23% of total global e-commerce sales. And statistics from Campaign Monitor show that for every 1 dong spent on email, you get 38 dong back. That number says it all: email is not outdated, it is one of the best conversion rate channels that you are missing out on.

What's noteworthy is that, unlike paid advertising, email is your own asset. You don't have to worry about algorithms like Facebook or Google. When a customer leaves their email, you have the right to reach them at any time with almost zero cost. Let's explore 5 practical email marketing tips to help you significantly increase sales.

Why is email marketing the most worthwhile investment for online shops?

5 email marketing tips for online shops to boost sales

Unlike social media where you have to pay to reach followers, email is a fully owned channel. When customers subscribe to emails, they have allowed you to appear in their inbox – a private space, much less competitive than a news feed. That's why email marketing remains the channel with the lowest cost but brings the highest efficiency.

You can send emails to thousands of customers at no extra cost. Meanwhile, Facebook or Google ads are increasingly expensive and difficult to measure. Email allows you to send deeply personalized content, thereby building strong relationships with each individual. A study by MailChimp indicates that the average open rate in the e-commerce industry is only about 16%. This means 84% of your emails can be ignored – but if you know how to write a suitable subject line and content, you will be among the 16% who are read.

Tip 1: Write email subject lines that people can't ignore

Customers' inboxes receive dozens of promotional emails every day. If the subject line isn't attractive enough, your email will get lost. The subject line needs to be not only concise but also evoke curiosity, emotion, or create a sense of urgency. This is the deciding factor for your email open rate.

Here are some proven subject line writing methods:

  • Use scarcity-inducing words: “Today is the last day”, “Expiring soon”, “Only a few hours left”.
  • Create curiosity: “This will change the way you shop”.
  • Emphasize specific benefits: “30% off your next order”.
  • Make a promise: “The secret to choosing gifts everyone loves”.

However, don't overuse them. Try A/B testing with different subject line versions to see which style your customers respond to. A good subject line answers the question: “Why should I open this email?”. Put yourself in the customer's shoes before hitting send.

Tip 2: Send sincere thanks to your customers

Many shops forget about customers after making a sale. That's a big mistake. A thank-you email after purchase, along with a discount code for the next purchase, will create great goodwill. Customers will remember you and be willing to return when they have a need.

Don't just stop at a regular thank-you email. You can send birthday wishes, ask about product usage, or give small gifts. All these actions contribute to increasing customer loyalty and reducing churn rate. Loyal customers not only buy more, but they also become free brand advocates for you.

Taking care of existing customers is much cheaper than finding new ones. A timely thank-you email can turn a one-time buyer into a lifelong customer.

Personalize your emails. Use the customer's name, mention the products they purchased, and offer suggestions tailored to their shopping behavior. This helps customers feel genuinely cared for.

Tip 3: \"Rescue\" abandoned shopping carts

Did you know that according to Baymard Institute, an average of 69.57% of shopping carts are abandoned? This means that out of 10 people who add products to their cart, 7 leave without completing the purchase. This is a \"gold mine\" that many shop owners overlook. They were interested in the product, just lacked the motivation to complete the transaction.

Abandoned cart reminder emails are a powerful weapon. Send a simple message, reminding them of the items waiting for payment, with visual images and a link back to their cart. Sometimes, just a small incentive like free shipping or a small discount is enough to bring them back to complete the order.

Steps to implement an abandoned cart email campaign:

  1. Determine sending time: Usually 1 hour, 24 hours, and 48 hours after cart abandonment.
  2. Gentle reminder: The first email should only remind them of the products, no incentives needed.
  3. Add incentives: The second email can offer a discount code or free shipping to encourage action.
  4. Final email: Create a sense of scarcity, e.g., “Stock is running low” or “Offer is about to end”.

Don't forget to optimize the call-to-action (CTA) button in the email. A clear, visible button like “Complete Order” will help customers return quickly.

Tip 4: Leverage holidays and personal events

The end of the year, from November to January, accounts for about a quarter of online stores' annual sales. This is a golden period for you to implement email campaigns with themes of holidays, gifts, and discounts. Occasions like Christmas, Lunar New Year, and Black Friday are unmissable opportunities.

But don't forget your customers' personal events – occasions when they are most willing to spend money. Birthdays, weddings, baby showers, wedding anniversaries... are all opportunities where you can send congratulatory emails with special offers. Ask your customers about important events in their lives. You can create a form for them to fill out, then store and use it when needed.

Beautifully designed gift tag images also make your brand look professional and sophisticated. If you don't have the resources for design, you can use online tools to create simple tags, or use professional design services to make a strong impression on customers.

Tip 5: Automate to not miss any customers

A study from 2013 showed that the average online customer receives about 416 promotional emails per month. This number has certainly increased in recent years. If you're not prominent enough, your emails will become a grain of sand in the desert. The solution is to use automation tools like MailChimp – you can segment customers by age, gender, shopping behavior to send emails suitable for each group.

Automation helps you save time and ensures you don't miss opportunities. Here are some types of automated emails you should set up:

  • Welcome email when a customer signs up for notifications.
  • Abandoned cart reminder email.
  • Birthday greeting email with discount code.
  • Post-purchase feedback email.
  • New product notification email based on customer preferences.

Thanks to automation, you can focus on doing business instead of manually sending emails. Just set it up once, and the system will work for you 24/7.

How to prevent email marketing from backfiring?

Email is a double-edged sword. Sending too many makes customers feel annoyed and unsubscribe. Sending too few makes them forget about you. The best way is to listen to the data: monitor open rates and click-through rates to adjust frequency and content. Always provide value before selling, don't just focus on sales pitches.

In addition to the 5 tips above, you can also combine other types of emails such as welcome emails, new product announcements, promotional emails, discount notification emails... but with a clear strategy. A reasonable email schedule will help you maintain customer relationships without annoying them. Segment your customer list by behavior and preferences so that each email has real value.

So now you have the secrets to get started with email marketing right away. Try starting by writing a truly captivating email subject line, or send a thank-you email to your most recent customers. You'll see the difference in just a few weeks.

What about you, have you ever underestimated email marketing? Which tip will you apply first to your shop? Leave your thoughts in the comments section, I'd love to hear from you!

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