An Emailer is an ad format where we send direct communication to clients or readers via emails. The length of the email can vary depending on the content, and it includes a subject line and a click-through link. The maximum file size for an emailer is 100 KB. While animated GIFs are allowed, only the first frame will display in many email clients, so it's important to ensure that the first frame contains the brand name and a clear call to action. This is sent to 28,000 plus audiences.