You use a web browser every single day and it is one of the easiest and most impactful things you can change. Depending on the browser you use it can and will collect and sell your data.
Many first part browsers by large companies do this, such as, Chrome, Firefox( recently updated privacy policy to remove promise to not sell your data), Opera & Opera GX, Edge.
There are two types of Browsers right now, those based on the Chromium project (most of them), and those based on the Firefox project
Instead use a more privacy focused browser. My recommendations are
Vivaldi https://vivaldi.com/
One of the most feature rich and privacy focused chromium browsersLibrewolf https://librewolf.net/
The best, most private firefox fork you can use daily Its just chrome without google spying on you