Some websites use third-party content providers. You have the ability to stop these third-party content providers from tracking you across websites to advertise products and services.
Prevent cross-site tracking
Open Safari and go to Safari > Preferences, then click Privacy.
Select “Prevent cross-site tracking.”
Unless you happen to visit the third-party content provider as a first-party website, their cookies and website data are deleted.
Social media sites often put Share, Like, or Comment buttons on other websites. These buttons can be used to track your web browsing—even if you don’t use them. Safari blocks that tracking. If you still want to use the buttons, you’ll be asked for your permission to allow the site to see your activities on the other websites.
See who was blocked from tracking you in Safari on Mac
You can also see who’s been blocked from tracking you when you visit a website.
In the Safari, enter the web page name or URL in the search field.
Click the Privacy Report button in the toolbar, which is located to the left of the search field and looks like a shield.