Ads for wrong category on my adsense site

I thought I had seen something about this on DP before, but can not find the correct post. I have made a website about tracks (music), but when I insert adsense on my site, it also shows ads on tracks (rubber tracks etc). Is there not a code I can implement on my site, so that I get only music track/music ads? Thanks.

 

The keywords on your site give you the ads, you to change them perhaps. Or block those ads.

 

I have seen a thread, that explained how to ad some code, I think it was before and after the ads. Here you could write what ads you wanted/prefered/not wanted?! Have searched, but could not find it. Someone please?

 

http://www.dnseo.net/google-adsense-adsection-tag/

Thats the first article I found on what your asking about, you might find more that go more in detail.

 

Thanks!! That is what I was looking for. I tried to implement it, but did not understand ecsactly where this code should go in the ad? Will try again more tomorrow..