Email is one of the central components of online marketing. While email has been around a long time, there are always improvements that can be made. For instance, how is your subject line copy? The subject line can make or break your email. Luckily, studies have found there are are a few words that increase click-thrus, as well as a few to avoid.
The word "upgrade" has an open rate 66 percent higher than the average, followed by "just" at 65 percent, and "content" at 59 percent (1).
Which words have a negative impact? the words "miss," "deals!," and "groovy," all decrease open rates about 4 percent.
Words are just one ingredient of your subject line. Making it too long or too short can also negatively impact conversations. Subject lines with between 4 and 15 characters hit the sweet spot, achieving an open rate of 15 percent on average (2). Subject lines with more than 50 characters fared the worst, with just a 10 percent open rate.
A lot goes into creating the perfect subject line, but avoiding these unpopular words and keeping it short and sweet add up to a better conversion rate.