Source Chris Hoffman, HowToGeek.com, February 7, 2019
“Do Not Track” had a lofty goal: A simple checkbox in every web browser that would tell websites not to track you. It achieved that goal, but here’s the problem: Websites didn’t care.
As we pointed out back in 2012, the “Do Not Track” option doesn’t stop you from being tracked. It just sends a special piece of information whenever you connect to a website, asking that website not to track you.
The vast, vast majority of websites ignored this. That never really changed. There was no penalty for ignoring the request and little reason to actually honor it.