The most important part of any text marketing resource is the final section: the call to action.
From direct mail marketing all the way to the online world, the most effective sales pages and promotional emails are designed with a clear call to action, whether it is calling for people to buy their product, donate to their cause, or even simply visit their website.
Success as an email marketer is dependent on a lot of things. The call to action is both psychology and mathematics; marketers need to understand basic psychology and emotional actions to implement it, and then require mathematical analysis abilities to hone and test it.