Go to the Chrome Wed Store and search out AdBlock Plus, a Chrome extension.
Ad blockers work off a set of rules about what it presumes is an ad and its own table of domains where ads originate. Most are good at removing ads but can sometimes prevent some web sites from working properly. In that case, you suspend the ad blocker for a time or try another blocker.
Chromebook users will be limited to a specific blocker, since Chromebooks cannot download and install software.
"Kitchen duty is awarded only to those of manifest excellence..." - The Master, Dogen