Stopping By to Say Hi is a Special Badge on a wiki. It can be obtained by leaving a message on someone else's talk page or message wall, depending on whether the wiki has the extension added or not. If, for example, an editor was to post on their own Message Wall, then they would be able to earn the badge themselves. This does not work for talk pages. It gives the editor 10 points.
Wiki stores images of badges on GitHub for the public domain. Badges can be displayed with the following dimensions: