If you are wondering what Google Tag Manager is, think of it as a central hub for accessing and controlling all your data. If your data is all over the place, then you should be wary of the measurements you are getting.
It could be that you once installed GTM and tinkered with it a bit. But then you gave up out of frustration because you underestimated Google Tag Manager’s intuitiveness. Don’t worry, you are not alone – almost anyone can do the most basic things in GTM (for example, getting their tags all set up) but find it difficult to go beyond that to unlock its full potential.
But trust us, you can do a lot of useful things, even if you have a fundamental understanding of Google Tag Manager.