It means what it says: Do. Not. Track.
We don't want you following us, collecting every nanoscopic bit of data about us you can, cramming those bits into a file about us, & then selling that file to anyone with a penny to add to your coffers.
How would YOU like it if an army of voyeurs surrounded you, kept notes of your every action, recordings of your every word, video of your every nose pick, every site you visited, every purchase you make, every tv show you watch, every movie you stream, every song you listen to, every app on your SmartPhone, every time & for how long those apps were used, your physical location in real time with GPS tagging on a moment to moment basis, and every other aspect of your every living moment... all so we can broadcast it to the world+dog to enjoy on a PPV channel for our enrichment?
Because that's what you're doing & that's what we want to stop.
Stop tracking us. We may just decide to return the favor. You may be a multi billion corporation with thousands of employees, but We Are Legion & can storm your every structure to drag your asses outside & kick the shit out of by a mob of angry peasants armed with pitchforks, torches, & buckets of boiling pitch...