How do I make a different Title for each page?

Hello! I am making a culinary site for these lessons: https://www.youtube.com/playlist?list=PLUjqTJN3byC9fUoXFnoNGlYBCBZOJUPca

The sixth video tutorial shows how to create a Title for all admin pages. Here’s a screenshot:

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How to make different Titles for each page? For example, Title for the Users page, Title for the Categories page.