:: a wiki project
Redirects allow you to direct traffic from one article to another, or to a specific section of another article. There are lots of reasons to use them; this page lists a few.
Redirects are easy: for pages in the same group, just put (:redirect TargetPage:) at the top. If they're in different groups, use (:redirect TargetGroup.TargetPage:) instead.
If you want to redirect to a specific section within an article, use (:redirect TargetPage#section:), and make sure the target page has a for that section.
Some subjects have more than one name: Hervithe and Hill Folk, for example, are the same thing, so they shouldn't link to two separate articles. It would be confusing and inconvenient to try to avoid one of the names, so instead we use a redirect.
Even if something only has one name, it might be complicated. CJ's First Record and Over the Sea: CJ's First Notebook both redirect to Over the Sea, so editors don't need to remember which one is the "real" link.
Sometimes a page needs a new name. Maybe it was wrong the first time, or maybe the name changed, like Slam Justice becoming The Spy Princess. The easiest way to rename a page is to create a new article with the new title, then copy and paste the information from the old article into the new one. But what do you do with that old article? If you simply delete it, you lose the page's history, and you break all the links to the old page. If, on the other hand, you redirect the old page to the new one instead of deleting it, you avoid all of these problems!
Some articles, like Marriage and Weddings, discuss a few related but distinct topics. On other pages, if we're talking about weddings we don't necessarily want to link to marriage, too. So we set up redirects: Marriage redirects to the marriage section of Marriage and Weddings, and Weddings redirects to the weddings section. Now, if we ever decide to make Weddings and Marriage into two separate articles, we won't have to change as many links.