It uses a Google thing that reads yer cookies and gives you ads you may be interested in, so If you are getting sexy ads we know what you are doing.
For the record...it is not a 'Google Thing'. When you're on Google's search results page after a search, those 'Sponsored Links' on the right side...that's Google.
When you go to a website like GlastronSpeed, or any other site...the administrator of a website has specifically installed Ad software to monetize the site. (That is not a bad thing btw.) Sometimes the web provider (hosting company) will make you have the Ads and then issues the domain for free...they absorb the initial costs and then make money on the Ad revenue over time.
Google has nothing to do with popup ads.