To manually implement the Taboola Pixel using Google Tag Manager using custom HTML tag, please follow the instructions below.
How to Install Taboola Pixel using the Google Tag Manager.
How To Track Specific Events
Easily track event-based user interactions within your web assets. You can use event-based conversions for special (and sometimes more complex) scenarios such as tracking users who read up to a certain length or percentage of the page, clicking a button, or for tracking engagement on a page, where people are not leaving too quickly and are reading the content.