Chromebook Running Slow?

Using a browser like Chrome saves some information from websites in its browsing history in cache and cookies. Clearing the browsing history fixes many problems, like websites and apps not loading or formatting issues on websites. Your browser tends to hold onto information, and over time it will cause issues with logging in or bringing up websites. It’s always a good idea to clear out the browser history, cache and cookies, regularly. The drawback to this is that some websites may take a little more time to load on your next visit. But on the plus side, your privacy is more secure, and your Chromebook will work better.

Instructions are here