Tag management system. Also known as “tag managers.” Modern websites tend to load multiple JavaScript routines. Some scripts load from the site itself (“first-party” locations) and others from remote sites (“third-party” locations). Having to alter code every time a script needs to be added or removed would be cumbersome, so a TMS is a “super tag” which loads others tags on-demand. The TMS is typically managed via a simple web user interfaces, and marketers or website admins can point-and-click through the management of adding and removing tags.