I have created a Adsens account. When I was creating that there was a option to put my sites where I want to display Adsens. Can you tell me if I have many sites then how can I use Adsens from one account?
you should only have one adsense account and then create channels to each site or page to create test and check the performance and all that
You can use as many sites as you want with 1 account.All you have to do is to read adsense TOS to see if your new site fits.Thats all.
There is no need to tell google, how many sites you have to put adsense code. but if you do, google tell you reports. Optimization and earning reports.