adsense help

hey guys, i bought a tumblr domain and i have adsense on, only 2 ads, i know i can have 3.

but my question can i use this adsense acc to other blogs, pages etc?

and if yes whats is the best i should do?
help pls... because my earning sucks till now.

you need to increase some authority then use it , if your account is new then they will bann,

Why don't you get a domain establish a website well and then place ads.Hope that will help to increase your adsense earnings than hosting in free sites.