Should You Have A Separate Google Tag Manager Container For Each Domain & Sub-Domain?

You're setting up your website and it consists of a few different apps set up across a few different sub-domains. So you have a root domain website (yourdomain.com) and say 2 sub-domain apps; app1.yourdomain.com and app2.yourdomain.com.

You want to install Google Tag Manager on all of your domains but there's just one problem; you're not sure if you should create a separate Google Tag Manager container for each sub-domain and your main domain, or if you should install just one Google Tag Manager container on all 3!?

I would just install one Google Tag Manager container on all 3 domains. There's no need to separate them and it's more of a headache to manage multiple GTM containers. It might even cause some issues with conversion tracking and attribution, depending on how your website is setup.

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