In short: Google Tag Manager manages and fires measurement and marketing tags according to configured rules. It does not by itself ensure correct measurement, consent or data-layer quality.
How I use GTM (Google Tag Manager) in practice
I do not judge GTM in isolation by platform performance. I check the connection between message, landing page, form and what happens to the contact next. I start with a small test of different arguments, not dozens of cosmetic variants of the same advertisement.
What to watch
The channel changes faster than the decision principle. I therefore do not build the process around one trick or exact tool interface. Data ownership, message quality, excluding unsuitable audiences and the ability to verify the result matter more.
Questions for decisions
- Whom do we want to reach and whom should we exclude?
- Which offer or message hypothesis are we testing?
- What happens after the first response and who owns that step?
- Are we measuring customer quality or only channel activity?