A browser extension
which blocks advertisements
This is something you should love, but not too much (as it decreases revenue to the advertiser).
Some adblockers, mainly ABP and Adblock, even the Chrome Built-in Adblocker enroll in the Acceptable Ads program.
This allows some good ads, but blocks shitty ads. However, this can be disabled (except for chrome built-in).
Hornorable mention: uBlock Origin
Some scummy websites may ask you to "disable" your adblocker, but theres an app for that with fuck overlays (or nope to overlays), scrollfucker, and sometimes the userscript aak (anti adblock killer)