After your AdSense account has been activated, you can start showing ads on additional sites. You can show ads on any site that you own that complies with AdSense programme policies.
To show ads on a new site, first add the site to your sites list in AdSense.
Note: If you place your ad code on a site that's not in your sites list, ads won't appear on that site.
Change your existing site
If you want to change the site where you currently show ads, make sure that you add the new site to your sites list first, before you place your ad code.