In one sentence, describe what the following article is about:

It will be either at the bottom of your screen or in one of the top toolbars. It looks like this: Click on the drop down arrow next to the "ABP" logo and select "Filter preferences..." from the menu. This opens a new window. On the left-hand side of the window, ensure that "Ad Blocking Rules" is highlighted. On the right-hand side of the window, click the button called, "Add filter." Copy and paste the following into the box: ||s.ytimg.com/yts/img/* Close out of the "Filter preferences..." window. Refresh YouTube; all of the image thumbnails for recommended videos, recommended channels, subscriptions, and even the YouTube logo should now be invisible, replaced by gray rectangles.
Locate the AdBlock Plus button in your browser: Filter Preferences: Blocking Rules: Add Filter: Type: Press enter. Result: