About Tealium iQ Tag Manager tag implementation under Google Tag Manager.

[Takahiro0401]

When implementing Tealium iQ Tag Management Tag (utag.js) under Google Tag Manager, is it necessary to check the checkbox next to “Support document.write” ?

Please give me some advice.

[mitchellt]

Hi @Takahiro0401 - as I recall, that's only necessary if one of your tags fired by GTM uses document.write (an old technique).   It's a compatibility switch basically.  I'm pretty confident that a "best practices" Tealium implementation would not use document.write.

[Takahiro0401]

Hi @mitchellt. Thank you for your reply. I will implement Tealium without using document.write as your advice.