Every time someone logs on to the web, Google and other internet providers store data about what they've been searching for.
From today, Google is changing its security settings making it easier for it to share people's data.
The change means that info collected by one Google service can be shared with other services they own, like YouTube.
Google says sharing data about what people are searching for allows them to better target what adverts to show you.
But some members of the European Parliament are worried the changes mean the company might now be breaking the law.
They want to make sure people have control over their personal information.
Ricky speaks to the BBC's technology expert to find out more.