Configuring Quickload with Google Tag Manager: a complete guide
Most B2B sites load everything through GTM. Here is the right way to defer the container, then configure GTM's own triggers for tag-level scheduling.
Quickload defers the GTM container itself, but tags loaded *inside* GTM have their own scheduling. This guide walks through configuring both layers so they don't fight each other.
Layer 1: defer the GTM container with Quickload
Install the Quickload WordPress plugin, enable it, set the trigger to interaction (the default). The container script tag will be rewritten so the browser parks it until the user scrolls, taps, or clicks. Lighthouse will see a clean main thread during the LCP window.
Layer 2: configure GTM's own triggers
Once the container fires, GTM loads its child tags on whatever trigger you've configured inside GTM. The default for most tags is "All Pages," which means they all fire the moment the container boots. That undoes most of the benefit of deferring the container in the first place.
The fix is to use GTM's Timer trigger or Window Loaded trigger instead of All Pages for non-essential tags. Quickload's GTM helper page generates the recommended timer interval per category: 2s for analytics, 3s for advertising pixels, 5s for chat widgets and heatmaps.
Verify it works
Open your site with ?quickload_debug=1 in the URL. The console will log when the container fires; GTM's debug mode will log when each child tag fires. If a tag is firing earlier than its configured trigger, the GTM trigger isn't set correctly — fix it inside GTM, not Quickload.