The infobox description says "Provides features for campaign organizers and participants", but it's not 100% clear what a campaign is. Consider adding a word or two to make it more clear.
Topic on Extension talk:CampaignEvents
Also, examples of the features, e.g. "such as X, Y, and Z" might be good.
Hello, @Novem Linguae! I'm the product manager for the Campaigns team that developed the tool. Great question, and apologies for any confusion! In this context, campaigns means events that summon people to contribute to the wikis. However, we are also broadly building tools that can be used for many event types, such as edit-a-thons, meetups, etc. For a more detailed explanation of the tool and how to use it, we recommend you check out our User Guide on Meta-Wiki. We will also look into how we can add more clarity to the documentation on Mediawiki.org. Thank you!