User blog comment:Rappy 4187/Technical Update: November 2, 2016/@comment-27401266-20161103162300/@comment-27345308-20161103162836

FandomBot is a replacement for WikiaBot. Wikia-Visualization-Main,(wiki URL).png is the visualization image, ie the image used for the old Promote feature, that modifies the image that appears when the wiki is searched for on homepage:Special:Search (for example, if you search for Undertale Wiki)