Use your product’s benefits
If you are using a call to action in your newsletter design, you need to use the benefits of what you offering. If you want your readers to act, then you need to frankly clarify the benefits that your readers will get when they act.
Use a call to action
Using call to action in newsletter designs is certainly the second most important part of your email marketing email after the subject line. So, you need to make the call to action extremely obvious what your readers should do after they read your email marketing email.
Understand your target audience
You should know your target audience, before writing any email marketing email. You can understand what is important for your audience by knowing them. This includes not only the benefits and features of your offer which are most important to them but also the language they will best to relate to.