When testing if bugs occur generally or just in certain situations.As troubleshooting step if you have issues.It’s good practice to delete them in the following situations (list not conclusive): While there is no harm in deleting them every time before you start the game that kind of beats the purpose of cache files.
Over time these files accumulate out-of-date data (especially if you use custom content and mods) and because of this, it’s best to delete them from time to time (just as you delete your browsers cache from time to time). If they are not available, they are created. The game checks on startup if those files are available and if so, they are loaded. To be able to load faster, the games stores data in so called cache files.
