Contextual ads? A new way of doing SEO?

Have you heard about contextual ads? It's just like we see some Google ads that were attached in the blogs and websites. Is this a new way of SEO? Or is it just another way of advertising your business or product? We'll for me, this is gonna be both. Why? You may know that you advertise your own business and site, but don't you know that it may also increase your SERPS? If you attach contextual ads like Google Adsense, Text Link Ads, Clickbank and other affiliate programs, you may have a chance to generate more sales in visitors' clicks to your ads and possibly may purchase the product through your Clickbank or CBProAds text link or banner. Advertising to other sites through making payments to webmasters are just temporary, but if you like to advertise it for yourself and generate more sales in your contextual ads, I shall say it would last long and considered to increase my backlinks and SERPS.