Since cache is a folder stored inside computer, huge collection of such files may run you out of disk space and slow down your computer.
Your browser shows up older page content and ignores fresh content from the website. So, you may end up reading obsolete content or may not land to what you were looking for.
The information stored in browser cache is sometimes incomplete or corrupt.
Clearing cache clears significant amount of data from the browser memory. If you had stored your username/password for a website, there is a high probability that you will lose that as well.
Since cache holds downloaded content, clearing the same would mean that websites would load slower (for the first time) when you visit the websites again.
Clearing the cache is necessary as it has functionality changes and your browser might have obsolete information stored on it which is no longer valid.
*CTRL + SHIFT + Delete: Opens the clear browsing data dialogue
Since we are concerned with browse cache, tick mark the option reading Empty the cache and uncheck all others. In order to clear cache completely we suggest that you select the beginning of time from the drop down. Click on Clear browsing data when done.