Placement

Placement is also very important, and the CTA button needs to be put where the user is going to look next. As a designer, you can anticipate and predict this behavior. You don't need to be fancy, but just logical:

Here it's pretty straightforward where you have to click. The CTA is placed logically after the form.

On the other hand, here is an example of something not very straightforward:  

In this example, the button is not placed intuitively and the user has to go back up to click on the CTA rather than after the content.