[xiande04]

There's a section in the article titled, "WHAT DOES GOOGLE TAG MANAGER DO?":

> Whilst Google would love the general public to believe that Tag Manager covers a wide range of general purpose duties, it's almost exclusively used for one thing: surveillance.

[munchler]

That’s a single word, not much of an actual explanation.

[Finnucane]

the "general public" probably has no idea that Tag Manager is a thing that exists.