which ads have higher Page eCPM
 

Anybody please elaborate which ads is more profitable for website?
mostly i use Link unit ads but i get only $0.40 eCPM?
any idea to improve Page eCPM?

Yes, more traffic, more click thrus.

Try viral marketing, don't SPAM blogs, but post useful advise in high traffic areas related to your site. People WILL follow the link back to see who you are, and if your site is useful, they'll bookmark it.

Some blogs send me 100 visitors a day and that's 100 that I didn't have before, repeat that 10 times and you have 1K new visitors.

Come on, marketing it easy, get with it ;)