TrackJS), they’ll see those 404 errors in reports. To ensure that tags do not fire twice, remove from your code any hardcoded tags that have been migrated to your Tag Manager container. But it will also work if you keep the hardcoded Google Analytics and implement the outbound link tracking via GTM+GA. Click the. Because if that plugin does not display GTM (present on a page), then it means that nobody has actually added the snippet. My understanding is now that these places will work. It is recommended to remove the hardcoded GA code, migrate fully to Google Analytics via GTM. There must be some logic written that adds actually dynamic information to the dataLayer (e.g. Should I just go to each page and install the GTM code myself? Thanks! WordPress), look for ready-made plugins that will help install Google Tag Manager with a couple of clicks. When Google Tag Manager code is placed on your website, it automatically creates a Data Layer. One of our clients have installed the first GTM snipet in the section, but I can't see it properly from within developer tools and/or "View Page Source". If you are not experienced with code or do not have access to your website or mobile app code, you may need to enlist the assistance of a developer for this step. Hi thanks for all the useful info, but should the code be added to just the index.htm page or to every .htm page? Hey, read this Here’s an example of the website’s where you could add the Google Tag Manager