Learn how to launch an ad with AMS for your Merch By Amazon Business;
after you have received your code head out to https://advertising.amazon.com/
click on Sign in if you have an amazon account or Register to create new one.
after you fill out the application they will ask you what type of an account you want to open, and you have to choose; I am mercher agent. And than they will ask you enter your code given to you by amazon. Enter your code and you will be asked to confirm email. and than after confirming the email.
After creating your account you will need to wait for couple days to approve your account.