To find out why your AdSense account can’t be activated, either sign in to AdSense or read the email AdSense sent you.
The main reasons why AdSense can’t activate an account are described below.
There’s a problem with your site’s content
Review the AdSense Program policies to make sure your site is in compliance. Keep in mind that AdSense may review all pages of your site, not just the sign-up URL where you placed the code.
After you’ve adjusted your content, sign in to AdSense, and confirm that you’ve resolved the issues on your site. AdSense will then proceed with activating your AdSense account.
You have two accounts
AdSense policies only allow one account per publisher. After you’ve closed the other account, sign in to AdSense and confirm that it’s closed.
AdSense will then proceed with activating your AdSense account.
Note: Publishers whose accounts have been terminated for invalid traffic or policy violations will not be allowed to open a new AdSense account as per the AdSense Terms and Conditions.