A specialist in marketing may need a lot of instruments:
- Web analytics services.
- Pixels of social netrorks.
- Online consultants.
Google Tag Manager is just a container for numerous marketing scripts.
Advantages of Google Tag Manager:
- It is the responsibility of a specialist in marketing rather than a programmer.
- It is convenient: you have all the marketing scripts manageable from one central dashboard.
- May suffer from adblocking software.
- If you have only one or two marketing scripts, it may be an overkill.
In Google Tag Manager add tags (trigger All pages):
- Google Analytics