We use IDs of categories and/or articles in our customized themes. Follow these steps to find the ID of a category:
1. Go to Guide
2. In the sidebar navigation click on the Arrange content icon
3. Find the category which you want to get the ID of and click on the three dots to the right of that category to edit the category
4. Note the URL in the browser. Here is an example of what it will look like: https://www.yourzendeskinstance.com/hc/admin/categories/360003543712/edit
5. The number after /categories/ and before /edit is the ID of the category
6. In this case: 360003543712
If you need further customization or help please reach out to us!