[troyvit]

I block it too. However, it is only what it says on the tin: a tag manager. IOW it's a convenient place to hold all those useful snippets[1] of javaScript in one place. Most companies want that place to be google because it's seen as bulletproof.

[1] And yeah most of those useful snippets are for tracking, but actually several privacy solutions like cookie management platforms can be held inside a tag manager as well. To me it's still worth it because if I block those CMPs along with GTM it means no banner and no agreeing to any tracking.