In general, the structure of the pages in the CMS reflects the navigation structure of the website. For example, the top 5 pages underneath the homepage, reflect the primary navigation items. The URL of the page indicates where the page can be found in the CMS.
For example, if you were trying to find this page in the CMS: https://dev-your-website.euwest01.umbraco.io/explore/animals/deer/, you would open the ‘Animals’ section by clicking the little arrow to the left of the icon, and then click on the ‘Deer’ page.
Once you have found the page, you can then make the edits that you need to.
Alternatively, you can use the in-built search using the search icon at the top right of the screen.
The main bar across the top gives you access to broad areas of the CMS. This ties to key functionality:
The exact list of areas may depend on your User Account Level and LOOP subscription but just remember this is for broad CMS areas.