Cache is the place where your browser stores images, fonts, and a bunch of other technical-sounding things like CSS, HTML, and JavaScript to save bandwidth. Without this feature, your browser would run a lot slower because every site you opened would require re-downloading tons of files.
To vastly oversimplify things, sometimes there’s a difference between the version of a website cached—i.e., stored—on your computer and the version that you’re loading from the web. This conflict can lead to weird glitches, and clearing your cache can help when nothing else seems to. mySecondTeacher is a vast website where the developers team is continuously updating the platform and the content teams are updating the contents dynamically. Therefore, clearing cache can optimize surfing for a smoother experience.