A Tag Manager makes your life easier when you want to modify any of the snippets on your website. Instead of waiting for someone to make these changes and to deploy your website, you can now easily make the needed changes yourself. This allows you to not only bring changes to the market faster but also reduces costs.
It also comes in handy if you embed many third-party snippets into your website and want to bring in some order to oversee all the snippets that are embedded and have a convenient way to manage them.
Your Tag Manager also makes sure that all your snippets are implemented correctly and loaded in the right way for faster performance.