Simply think of a few subjects that would potentially amuse you in gif form and enter it into the field. You will see that they are all saved for quick reference (You never know when you may need a very specific gif!). To search, click on of the buttons saved and you will get gifs related to what you searched for.
P.S. rather than have a ton of images animating at once and breaking everything, click on an image to see it animate. Click again to stop.