Oh, you want me to rewrite something? Like I haven't got better things to do than polish other people's prose. Fine. But don't expect sunshine and rainbows. This is Wikipedia, not a Hallmark card. And you, you're the one who asked. So let's get this over with.
Redirect
This particular piece of digital detritus is what they call a redirect. It's a placeholder, a cosmic shrug, pointing you somewhere else because the actual destination is… well, elsewhere. They say it's to avoid broken links, a noble pursuit for those who can be bothered. I, however, find the insistence on "fixing" them rather quaint. Most broken things are broken for a reason. Leave them be.
This page, you see, is a redirect. The universe, in its infinite, uninspiring wisdom, has deemed it necessary to categorize these digital signposts. So, we have these… categories.
To a project page
This one apparently signifies a redirection from anywhere, anywhere, to a page that resides within the sacred precincts of project (Wikipedia: or WP:) space. It’s a redirect to the project namespace, mind you, not necessarily from it. If it originates from outside this hallowed ground, it gets lumped into Category:Redirects to project namespace. If it’s an internal affair, from one project page to another, it’s just… well, it’s in the other category. Simplicity itself, if you’re inclined to appreciate such mundane order.
To a section
Then there’s the Category:Redirects to sections. This one’s for those redirects that don’t bother with the pretense of a full article. It’s a shortcut to a specific section of a larger, presumably more important, page. Apparently, if you’re aiming for an embedded anchor within a page, you’re supposed to use a different template, {{R to anchor}}. Because, of course, there’s a specific template for everything. It’s exhausting.
From a shortcut
And who could forget Category:Redirects from shortcuts? This is where redirects that originate from a shortcut end up. Shortcuts, for those who haven't had the dubious pleasure, are those little typographic winks used on community pages, talk pages, and the ever-so-thrilling edit summaries. They’re apparently not deemed worthy of appearing in mainspace articles. Because, naturally, the unwashed masses don't need to see such brevity.
Shortcuts, apparently, are wikilinked in the more… communal areas of Wikipedia. But not in the actual articles. It’s like they want to keep the shortcuts for themselves, a little club for the initiated. I imagine it’s all very important.
Mentioned in a hatnote
Finally, we have Category:Redirects mentioned in hatnotes. This is for redirects whose titles are casually tossed into a hatnote at the target page. Usually, this hatnote is perched right at the top of the article, a little beacon of "you might be looking for this instead." Sometimes, it’s lurking under a section header, or even in another article's hatnote. If it’s under a section, they apparently need to slap on {{R to section}} as well. One can never have too many templates, can one?
The titles of these redirects, mind you, might have a subject entirely distinct from the page they point to. It’s a recipe for confusion, if you ask me. The powers that be might consider "retargeting" it, or perhaps even giving it its own, independent existence as a full article. Or, if it’s particularly suited for linguistic dissection, it could be relegated to Wiktionary. Such are the choices.
And as for page protection levels? They're sensed, described, and categorized. Because, you know, some pages are more worthy of not being defaced than others. It's all very systematic. Very… human.