How is it affect to a website ? well, in my opinion, it brings more income to the webmaster, but at the same time, there are few disadvantages to the website :
1. confused the visitors - some webmasters try to earn more income by putting the ads near the navigation links, hoping the visitors will click the links. It actually sometimes confuse the visitors which are the links to the websites itself.
2. Make the visitors away - When a client clicks the ads, it will redirect the visitor to the website of the ads. So in other words, putting the ads in your website is actually driving your visitors away.
3. Image - If the website is well-established, or if it is a corporate website, puting too much google adsense ads will give the impression to the visitors : "This website or company is not professional, they still rely on google adsense to earn income, are their service/products reliable? "
Of course, some may not agree with what I said above. Let's let the visitors/clients make the judgement.
