I gave a client the sitewide container tag to place on their site but they said they are already using their own implementation of utag.js. They had asked for the thunder code snippet for Tealium to review. They said, "This code snippet is meant to be used with sites that already loading utag.js."
Where do I find the Thundercode snippet? Is it best practice to place an additional Tealium container tag if they're already using their own? In this instance, would it be best practice to just give them the pixels to place inside their Tealium container?