Group items tagged

You can see that the highest open rates occurred with four-word length subject lines and the lowest open rates were tied to nine-word length subject lines. But the click-to-open rates didn’t correlate, meaning high open rates did not correlate to high click-to-open rates.

The winner was seven words for overall engagement. And if you write a subject line with eight words, well, you’re in for a shock! It’s nearly half the performance as subject lines with only one less word.