Hi all, I have travel website but the ad that is being shown on top is about medical and not related to the content at all. http://picasaweb.google.com/anuarsyed/GoogleAdsense/photo#5145527856039904082
try go to your adsense account. go to filter site and list every site that you see shows up on your site which is irrelevant to you niche. this helps. keep monitoring your ads if you want to make profit from it..no free lunch
i have been running the site for more than 6 years already.. the ads has always been relevant until today only i get the medical ads..
Also try typing your web URL in the AdSense Sandbox and pick a different country. Do you still see unrelated ads ?
6 years back, the quantity of advertiser was not as much of now.. with the quantity rose, they tend to lost into improper target..so, the best way is to filter it a bit and let the system know that you dont want those ads there..