Why does it say unable to verify the tracking code snippet even if the tracking snippet has been already added on the website?

Why does it say unable to verify the tracking code snippet even if the tracking snippet has been already added on the website?

It could be due to any of the following reasons:
  1. You've pasted a different code snippet on your webpage's HTML code.
  2. There are typographical mistakes in the code.
  3. Your webpage takes a longer than usual (more than 10 seconds) to load. In such an instance, the Marketing Automation snippet code will be installed automatically at the backend and be ready to track visitors' data on your website