Now, it allows Google to integrate information it collects about you from all your Google accounts. So instead of treating your YouTube, Gmail and Google+ accounts as separate entities, Google now sees you as just one user. That should make it easier to target you with relevant ads.
If you think Google‘s new policy will let the company know too much about you, there are a couple of small steps you can take before Thursday to have some measure of control.
Clearing your Google History of web searches and pages visited won’t stop the company from collecting information about you. But it will prevent Google from sending you customized search results and will make the record of your searches and surfings partially anonymized after 18 months, according to the Electronic Frontier Foundation (EFF) advocacy group. You can also perform a similar maneuver with your YouTube search and viewing histories.
Here’s how to remove and disable your Google web history: