What is Google Tag Manager & How Does It Work?

Google Tag Manager (GTM) is a free tool that enables you to manage marketing tags without modifying code.

from Semrush blog https://www.semrush.com/blog/beginners-guide-to-google-tag-manager

source https://socialmediamarketingconsultantseo.blogspot.com/2023/02/what-is-google-tag-manager-how-does-it.html