Hi,
I am recently start to use google tag manager. just created account there, but some one suggested me if you have some technical knowledge about the site or what is going on backend then you could be use properly it. so is it really required to technical knowledge for GTM use.

Not required, but useful depending on what you want to use GTM for beyond Google Analytics.

That being said, what are your goals for GTM? What are you trying to achieve with it?

not necessary but it is always best to understand what, why, and How we'll be doing it.

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