The ads showing on my website are nothing to do with the niche on my page. There is no reason for anyone looking for a product in my niche would click an ad about viemo or setting up a gmail account. Not just that, but it makes the site look so much more amateur by showing seemingly non-targeted ads. So how does this work? Does adsense look at your whole site for an idea of content or just that particular page? Or does adsense look at the browsers cookie history and try and work out what they most want? Because if it does, it's not guessing mine very well. Is there anything I can do to help adsense pick more relevant ads?