Here’s how you can do that:
Four things to mention:
- Removing your Web History also pauses it, so it will remain off until you enable it again.
- Disabling Web History in your Google account will not prevent Google from gathering and storing this information and using it for internal purposes. It also does not change the fact that any information gathered and stored by Google could be sought by law enforcement.
- With Web History enabled, Google will keep these records indefinitely; with it disabled, they will be partially anonymized after 18 months, and certain kinds of uses, including sending you customized search results, will be prevented.
- If you have several Google accounts, you will need to do this for each of them.
If you want to do more to reduce the records Google keeps, The Electronic Frontier Foundation have Six Tips to Protect Your Search Privacy.