This validation is via an API call. You need the URL of the category page you want to check.
Another thing you need is your project ID, you can find it in your project at https://app.datatrics.com/project/settings.
The last important value is your API key. You can generate your personal API key over here: https://app.datatrics.com/account/api-keys.
This is a recommended Google Chrome extension to make the data more readable: https://chrome.google.com/webstore/detail/json-viewer/gbmdgpbipfallnflgajpaliibnhdgobh
The API call you need is:
If it returns the related category in Datatrics, the category page recognition is set up correctly. If not, please make sure categories are known by Datatrics via connecting an ecommerce tool or a category feed. Also make sure the URLs of these categories match the URLs on the website.