Every year we are seeing an increase in the number of marketing emails, so standing out in the inbox is absolutely vital. Using an Emoji in your subject can really help your email marketing campaigns stand out, which is why it comes as a surprise that only 6.9%, of 1,000 email subject lines analysed, contain an emoji.

Why are so few marketers and companies using an emoji in their subject lines? Some see using an Emoji as a risk, email clients show emojis in different ways, and even some email clients will not show emojis at all. So before broadcasting to your subscribers, testing your subject lines is paramount to ensure emojis are visible in the user’s inbox.

If you are going to use an Emoji, use it as an added extra, not as something that users rely on when reading the subject line. That being said, it is best practice to see what devices your subscribers open your emails on. If the majority is Apple iPhone, which holds a large share in email opens, you will be fine with emojis displaying correctly in subject lines, however, this may not be the case on other devices or platforms. 

Source: Aweber (https://blog.aweber.com/email-marketing/2019-email-marketing-statistics.htm