You know...that thing that other wikis have...
Okay, here are the pros and cons.
PROS
-motivates people to contribute
-makes the wiki look a little cooler
-makes the wiki more popular
-you can add extra ones that are specific to categories so that people help expand pages that need expanding in that category, even if the badges are only temporary (I think that’s how it works)
CONS
-may lead to unnecessary/spam edits
-adds competition, new users may start acting a little mean because of this
-the icons look really janky unless someone puts in the time and effort into customizing each one