Lets say I setup an account for domain.com I put adsense on my site, all legit following the placement rules and whatnot. Can I put adsense for the same ID on domain2.com domain3.com and domain4.com or do i need 3 more accounts ?
There is no problem at all, I have multiple domains and adsense on at least two of them, I did let them know that I had another domain at the time.
i tried it before and quickly realized that if i place my ads on some of my less visited sites then the overall income decreases... so put your ads only on your visited and popular sites. that's my suggestion to you
You can put your ads on different domains, this is totally fine with AdSense TOS but this can create problems with the general incoming (Smart Price problem). Anyway if you are a beginner my suggestion is to put adsense everywhere. You won't damage your income, maybe you will have 1$ instead of 1.44$ daily. But you can practice with channels and other stuff And also, you can practice with the Allowed Sites (AdSense Setup > Allowed Sites) Here you can put a list of domains where you are going to put the adsense banners. This is made to avoid your code to be somewhere you don't want it to be. So...you won't get any money from banners placed in domains not included in the Allowed list but also you won't risk someone to put them somewhere where they shouldn't be (so you can risk to be banned and bla bla bla) c.