This is a typical "no fluff, just stuff" situation. And in the end it means the visitors will see what they're interested in, not some random cool graphics you throw at them.
As stated above, site visitors adopt this advertising mechanism, because it is efficient in leading them to pages of interest and can offer ton of things they really want to see. Someone coming across an article on adsense was probably looking for shoes or doing research on shoes when they came across the article.
And most importantly for everyone, including visitors, this scheme can only improve as the process gets further refined to make ads more relevant to what you're looking for, not just a couple of keywords on a site.
Nowadays, it is because of AdSense that Internet surfers are looking after more interesting related things from banners, and the companies behind the site (Google and the advertiser) need to have better ideas to display, as expectations have increased a great deal.
So could "Do no evil" actually work in today's cut throat competitive marketplace? Well, as you can see it can and it does. And you, as a visitor are the one who gets to enjoy this the most. Advertising becomes less of a burden and more of a benefit, and is still a benefit you can choose to ignore.
Less obtrusive banners; banners that you're actually likely to be interested in and click means you'll be less annoyed by surfing the web and feel like you as a visitor being offered a relevant service.
Although some may feel reluctant to read articles that are there purely to compel consumers, undoubtedly without this consideration they are useful. Ultimately the adverts mean that you don’t have to go back to your homepage every time you are compelled to complete a purchase.
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