Steal These 7 Social Proof Subject Line Ideas

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Hello, and welcome back to another edition of eCommerce Alchemy - your one-stop destination for everything related to ecommerce growth.

You’ve probably heard the usual advice for writing effective email subject lines: keep them short, use familiar names, and avoid filler words. But here’s the thing—everyone else is already doing that.

So, how can you make your subject lines stand out in a sea of sameness? The answer is social proof.
Today, I’m breaking down how to use testimonials, numbers, endorsements, and more to create irresistible subject lines that get results.