Adblock and uBlockOrigin are both toolbar extensions for your browser.  Download them, install them (painless) and a lot of ads will disappear. 
You *can* go further to free your browser from ads, but those are a good start.
https://www.getadblock.com/
https://chrome.google.com/webstore/detail/ublock-origin/cjpalhdlnbpafiamejdnhcphjbkeiagm?hl=en