Because of this, it's good to clear out your cache every so often. It allows you to remove data you don't need on your phone, especially if an unknown data tracker is among your phone's cookies.

If your phone is running slower than you think it should, try clearing out the cache on your browser or most-used apps to bring it back up to speed.

A lot of files build up in the cookies and cache of your web browser, and you probably don't need them.