I have done a search but cant find a exact answer. I have multiple domains an I have 1 AdSense account, how do I put the google ads on multiple websites?? do I need to request permision for each domain name?? or once I got an account I can put it on any of my domains??
You simply paste the code on your differents domains, you don't need to ask for permission, but make sure your sites dont violate the TOS
Just log in and generate the code. Then go to the section on channels, and read up on how to implement these: this will help you to track your Adsense performance across multiple sites and sections of sites, as well as across different placements on the page or with different colours and blending. It's well worth setting up different channels. You don't have to ask permission to use Adsense on each domain, once you're approved you can just go ahead and use it on all your sites. But make sure you read the TOS carefully, and that all the pages you put it on aren't going to break the rules. If you think it would be a borderline case, you can always contact them and ask first.