What is Google Tag Manager?
To use web analytics systems, advertising services, and other third-party tools, you need to add their code to your site. It’s not difficult if you understand HTML and you’re using a couple of services, or if you have a full-time developer. You start facing problems when you need to make changes to installed code or add new integrations.
With Tag Manager Account, you can set up data transmission to Google Analytics, Yandex.Metrica, AppsFlyer, and other analytical systems; place Google Ads, DoubleClick, Facebook, and other remarketing tags on your site; place custom HTML scripts on your site to display banners, conduct A/B testing, and so on; quickly edit tags.