what is container tag
A container tag is a code snippet used in web development that removes the need for multiple data tracking codes being placed directly on the site. Instead, one code is placed on every page on a site. This code literally acts as a container whereby all tracking codes can be placed off site in the Google Tag Manager interface and fired from the one code on the site. This means that you can update, add or remove your tracking codes, through the Google Tag Manager interface, avoiding website development times.