It refers to the temporary file exchange area. The computer pulls out the most commonly used files from the memory and temporarily puts them in the cache. When the songs are buffered, a temporary file is formed, which will not be used the next time it is opened. Re-obtain the resources from the original website and call them directly from the cache area. The songs will load faster. As you can imagine, the cache directory is a folder that holds these temporary files. Hope it's useful to you.