Hi,
Phones are like your bedroom closet. Junk accumulates. If you don’t clean the closet every so often, it takes longer to find what you need, So you have to arrange your phone space by clearing junk files.
Deleting junk files provide you smooth surfing on your phone and its increase the performance of your device as well.
There are so many apps in the market to clean your junk and provide many features for improvement of your device. You can easily download them from many platforms.
I hope you like my suggestion.