I understand that your browser history is stored on your hard drive. It's not good to let your hard drive get filled up with stuff that you don't need, so it helps to clear your browser history every so often. If you use Internet Explorer, you can clear your browser history like this:
click on the gear wheel at top right of the screen.
on dropdown menu click Internet Options.
on next dropdown menu you can see how to delete your browser history.
Suggestion: clear it every two or three weeks, depending on how often you use the computer.