My site makes good money with adsense but there are adsnese ads that competitor with what I sell. It is my understanding that I can go to the competing site filter in and list competing ads. How often Google changes the ads on my site I figure I will have to go thought each page of my 200 page site with adsense ads on most pages and follow the instructions for posting the urls ads that are competitors in my filter list. I want to know how often Google changes my ads so I can plan on checking my site for competition sites or a easier less cumbersome way to do this
add each of the competing URLs to your filter one time.. The competing ads will go away as quickly as a few minutes, but it could take up to a few hours.
Sometime it is better to keep the competing ads because they pay well. If you remove all the competing ads, there may not be enough inventory with google to display relevant ads.