Key components of GTM

• Tags - are pieces of code that you added to GTM and then based on your conditions those tags will fire. Tags can be tracking codes, they might be codes that change the color of the button, they might be some other codes (What do you want to do?)
• Triggers - you need to decide when those tags to fire, that's where triggers are needed. A trigger is a set of conditions that must be met and then if that happens the tag that is linked to a trigger is activated (When do you want to do it?)
• Variables - (What when or how exactly?)