What is GTM?
GTM (Google Tag Manager) is a tool that can deploy a wide range of pre-set or custom tags (scripts) to your website.
Common tags include Google Analytics events, tracking pixels, and functional scripts that can enhance your website.
There are some limitations to its use, however, and it should be noted that any script that needs particular positioning on a page will likely not work – this is because everything fired by GTM is located inside its container, which typically is placed in the header of the page.