In the olden days, when we first started using computers and the internet, there were only a few image formats to choose from: JPEG, PNG, GIF. There were different uses for each of them. We used JPEGs when we needed high-quality images that were smaller in size, like on a website, and we used GIFs when we wanted our images to be animated or transparent. And PNGs were just… kind of there. But now you can't be successful on the internet without using more than just those basic file types—you need to leverage image manipulation libraries. These are libraries that let you easily manipulate your images so that you can make them larger or smaller; change their format; add filters or effects; crop them; rotate them, and generally do anything else your heart desires with them.