A mailer sometimes called an email creative or an EDM, is a type of marketing material that will be listed on some offers on WOW TRK.
These are email templayes you can use to send out to your subscriber list about a specific offer.
You should only send out emails to email addresses who have opted in to have email updates from you. You should have relevant opt-in information for how the user opted in to your list (along with their IP address and opt-in time/date).
Here is an example of a mailer for an offer:
In WOW TRK you will be provided with the HTML code for the mailer, see below for an example of this:
You can copy and paste this code into your email marketing platform, when the email is sent out the code will look like the first screenshot above.