Stop sending info to Goggle analytics, check in options,

I also have an add-on thats blocks sponsored results and Ads on Goggle search

Use Firefox for your browser

do not allow 3rd party cookies

get a good adblocker,  adblock plus or similar

if you are on Faceache, search for FB purity, gets rid of all adverts and all the other useless stuff they throw at you

I do not get adverts while surfing the Net, just about everywhere