how to tell what ads work better

how do i tell what ad units are preforming better? thanks

 

I'd thinking use different adsense channels.

 

Use AdSense channels.

Here is the url for more info https://www.google.com/adsense/support/bin/answer.py?hl=en&answer=9868

 

Adsense plus Analytics. You'll know which ad was clicked and where. if you have a big site.

 

Use channels and test!! rotate a different ad format each month but only change 1 thing at a time. That way you can deduce that the change was solely due to the ad format switch.

 

Lex has the right idea. Channels are great but also use analytics.

 

organize them in channels .. that might help