Advanced tag settings

The advanced settings control how the tag is loaded on the page and when it will fire.

It is important to have a good understanding of the order of operations before adjusting these settings.

The following image shows the available Advanced Settings, as displayed in the interface:

Advanced Settings

Send Flag

The Send Flag setting determines whether or not a tag sends out data when it loads. The default selection is Yes. If you select No, the tag loads normally but does not send data.

Bundle Flag

The Bundle Flag setting determines whether or not you want to bundle the tag configuration file into utag.js. Tag using the All Pages load rule are automatically bundled by enabling the Bundle Tag Loading on All Pages setting in the publish settings.

If your tag uses a custom load rule, you can bundle it by setting this flag to Yes.

The load order for bundled tags and those using the All Pages load rule is determined by the order in which they appear in the UI. Bundling affects the generated file on the CDN (utag.js).

Additional JavaScript files requested by the vendor tag will still load separately.

Loading Google Analytics before bundling:

utag Google

Loading Google Analytics after bundling:

utag Google Bundled

Tag Timing

The Tag Timing setting determines whether a tag loads when the utag.js file loads, or the tag loads when the browser sends the DOM Ready signal. The default setting is DOM Ready (default), meaning the tag does not load until the browsers sends the DOM Ready signal.

Selecting Prioritized means the tag will load without waiting for the DOM Ready signal. If you load a tag before the DOM Ready signal goes out, you will risk the possibility of a resource or data the tag depends on being unavailable when the tag loads, which can negatively affect tag performance and capabilities.

Synchronous Load

This setting determines whether the tag loads synchronously or asynchronously. If you intend to load a tag synchronously, you must include the Tealium synchronous utag.js file reference in the source code for the page. The default setting is No, which means that tag will load asynchronously. Tealium recommends loading tags asynchronously as a best practice.

Custom Script Source

This setting allows you to support a tag by using an external JavaScript file instead of a built-in tag template. Enter the URL of the .js file in the Custom Script Source field.

Remove the http: or https: protocol from the URL and use a relative protocol. For example: //[](

Supporting a tag using a custom JavaScript turns it into a blocking tag, which prevents other tags from running until this tag has finished loading. Though this tag still loads asynchronously, it does not load subsequent asynchronous scripts (for example, utag.10.js) until the blocking tag is complete. To load custom JavaScript for a tag without turning the tag into a blocking tag, use the Tealium Generic Tag to load it.

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This page was last updated: January 7, 2023