Cookies are the files which are created by the sites you visit and they should be cleared when browsing history is no longer needed.
Step-by-step explanation:
To clear cookies On your computer, open Chrome. At the top right, click More. Click More tools. Clear browsing data. At the top, choose a time range. To delete everything, select All time. Next to "Cookies and other site data" and "Cached images and files," check the boxes. Click Clear data.
You ought to erase cookies in the event that you never again need the PC to recollect your Internet perusing history. In the event that you are on an open PC, you ought to erase cookies when you have completed the process of perusing so later clients won't have your information sent to sites when they utilize the program.