I started a blog a few months ago, applied to Adsense, was accepted, and now I earn money from that blog. I have some new ideas for websites and plan to implement Adsense on those as well. Do I have to get each new site accepted by Google before using Adsense on these new sites? Or can I just slap my publisher ID on each new site?
As long as you know you do not violate any AUP, you can just slap on your publisher ID and it be done. However, if you want to know which site makes how much for you, it would be good to use the Adsense wizard and add Channel ID.