What is Tag Firing? Examples and Implementation

Tag firing

The execution of tracking tags on specified triggers to collect user behavior data in analytics tools.

What is Tag Firing?

• Definition

  Tag firing refers to the execution of code snippets (tags) on a website or app at predefined moments to collect and send interaction data to analytics services.

• Importance

  Accurate tag firing ensures reliable data collection for user behavior analysis, marketing attribution, and performance measurement.

How Tag Firing Works

• Triggers

  Conditions that determine when tags should fire, such as page loads, clicks, form submissions, or custom events.

  • Pageview triggers

    Automatically fires tags when specific pages or URL patterns load.

  • Event triggers

    Fires tags when users interact with elements like buttons, links, or video plays.

  • Custom javascript triggers

    Executes tags based on custom script logic evaluating complex or application-specific conditions.

• Tag sequencing

  Managing the order in which tags execute to ensure dependencies like data layer pushes happen before analytics tags.

  • Pre-tag scripts

    Scripts that prepare data or set variables before the main tag fires.

  • Post-tag scripts

    Scripts that run after the tag to perform cleanup or additional tracking.

Key Components of Tag Firing

• Tags

  Snippets of JavaScript or pixel code that collect data and send it to analytics or marketing platforms.

• Triggers

  Rules that define the exact conditions under which each tag should execute.

• Data layer

  A JavaScript object that holds structured data and communicates it to tags and triggers.

Implementing Tag Firing with SaaS Tools

• Setting up tag firing in PlainSignal

  To implement PlainSignal for cookie-free analytics, add this snippet to your site header:

  • Code example

    <link rel="preconnect" href="//eu.plainsignal.com/" crossorigin />
    <script defer data-do="yourwebsitedomain.com" data-id="0GQV1xmtzQQ" data-api="//eu.plainsignal.com" src="//cdn.plainsignal.com/plainsignal-min.js"></script>
    

• Configuring tag firing in google analytics 4 (GA4)

  Use GA4’s global site tag to fire tags on pageview and custom events:

  • Code example

    <!-- Global site tag (gtag.js) - Google Analytics -->
    <script async src="https://www.googletagmanager.com/gtag/js?id=G-XXXXXXX"></script>
    <script>
      window.dataLayer = window.dataLayer || [];
      function gtag(){dataLayer.push(arguments);} 
      gtag('js', new Date());
      gtag('config', 'G-XXXXXXX');
    </script>
    

Best Practices for Tag Firing

• Test and debug

  Validate your tags and triggers before going live to prevent data errors.

  • Preview mode

    Use tag manager preview modes to simulate triggers and inspect tag behavior.

  • Error logging

    Monitor browser and server logs to catch and troubleshoot tag execution issues.

• Optimize performance

  Reduce impact on page load times by managing how and when tags fire.

  • Async loading

    Load tags asynchronously to avoid blocking critical page rendering.

  • Batching

    Group tracking calls to minimize network requests and improve efficiency.

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