Don’t underestimate the importance of an email subject line. Does a sentence-style subject line, where only the first word is capitalized, perform better than a headline-style subject line? We ran a test to find out and here are the results.

Test finds out how important donor-centered language is in a subject line.

How using the word “free” in a subject line affects engagement and deliverability.

Does adding an emoji in the subject line improve email engagement?