Frequently asked questions (gtag.js)
The global site tag (gtag.js) provides a framework for streamlined web page tagging – giving you better control while making implementation easier. By using gtag.js, you will be able to benefit from the latest measurement features and integrations as they become available.
gtag.js and Google Tag Manager are separate and independent ways of tagging your website.
If you want to manage Google and third party tags from a single location without modifying your site’s code in the future, use Google Tag Manager.