Friends i dont understand that why we cant place gogle ads more than three places in a single page if you know the answers please reply.........
If they allow any number of ads in a site,then there will be millions of sites with just ads and no content. So ultimately visitor of such a site is forced to click the ads...
You can have up to 3 ad units, 3 link units, and 2 search boxes per page. https://www.google.com/adsense/support/bin/answer.py?hl=en&answer=9735
coz they don't want all page fullfill with ads,... that how.. LOL so user doesn't have any space to "BLANK" click
Above answer is correct. If you give lot of ads then your earning ctr will less and earning will effect. if you use some ads in content then ads will appear relevant and you will get top earning on single earning.