Initially, AdSense "served ads that related contextually to the content on a web page". (text-only, non-invasive ads, fair revenue) What you nowadays mean wit

Initially, AdSense "served ads that related contextually to the content on a web page". (text-only, non-invasive ads, fair revenue) What you nowadays mean with AdSense, the ads that follow you around (tracking, little revenue) started in 2009/10: "Google AdSense started using search history in contextual matching to offer more relevant ads". [my pov: this started a new Ad Tech boom which is now again on a tipping point and waiting for another disruption - because site owners get little revenue and it sucks for end users (crash browsers, drain batteries, too invasive, already own advertised the products)] https://en.wikipedia.org/wiki/Adsense#History https://en.wikipedia.org/wiki/Adsense#History