I understand you can drop cookies using tag management but how are they different from each other?
Tags are not cookies and cookies are not tags. Tags are a piece of code that resides in the head of the web pages. Their job is to drop cookies on the visitor’s devices. A tag can be used to set a cookie. Cookies are text-only strings of code placed on a computer or device for a variety of purposes including remembering a user’s preferences or the contents of their online shopping cart.