Terraria wiki: begone, Fandom! by Oliver

When your browser attempts to load a "terraria.fandom.com" wiki page, this extension will automatically and transparently redirect it to the same page from the "terraria.wiki.gg" official Terraria wiki.

Three reasons: fandom.com's wiki is no longer official, and, abandoned by editors, it is falling behind in terms of contents and updates. Second: fandom.com's wiki still ranks first in web search queries, showing above the official wiki. And, third, fandom's wiki is choke-full of advertisements, unlike the real official wiki.