Do Not Track is a setting in most internet browsers that allows you to express your preference not to be tracked across the web. Turning on Do Not Track through your web browser sends a signal to every website you visit that you don’t want to be tracked from site to site. Companies then know your preference. If they have committed to respect your Do Not Track preference, they are legally required to do so. However, many tracking companies today have not committed to honoring users’ Do Not Track preferences.