The document `<title>` gives a name to a web document. In the context of the WordPress admin, a unique, meaningful, title is important for various reasons:
- it allows browser's history to store meaningful entries
- when multiple browser's tabs are open, it allows users to better identify the tab content
- it's the first thing screen readers announce when navigating to a web page, thus helping users to identify the nature of the page content
Props chetan200891, mukesh27.
Fixes#46699.
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