Here’s a common tech term that you might not know the exact definition of: cache.
Cache files are used to store information on a temporary basis for quick access. The physical location of this can be either on a hard drive or in RAM memory.
The idea behind it is to store information the computer is probably going to need in a location that’s quick and easy to access. Since it can get to needed information quicker, the computer runs faster.
However, sometimes there’s an issue with some of that information that can confuse your computer. Deleting the files can clear up the confusion.