Study: These words will make or break your subject line

Researchers looked at results from more than 3 billion emails to determine the best- and worst-performing words and phrases. Are you choosing wisely?

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If you want to boost engagement with your email campaigns, it helps to say “thank you” in the subject line, according to a recent report from Adestra.

The report was based on data from more than 3 billion email attempts that were part of 125,000 global campaigns conducted by organizations in four industries (retail/B2C, conferences/events, media/publishing, and B2B).

The researchers selected the 300 most popular single words, characters and two-word phrases and then looked at the relative lift or decay of each term versus the average.

As the report notes, the results only provide a “broad interpretation of the causal effects of individual words”; that is, they are an overview of average performance, and the terms won’t always work for every brand.

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