The MongoDB 4.2 GA Challenge is an opportunity for developers to share their thoughts on the new features in MongoDB 4.2, including wildcard indexing, aggregation enhancements, and full-text search, among others. The challenge aims to gather feedback from users on how they plan to use these features in their next applications. To participate, developers must fill out a form with their answers, which may be included in an upcoming article, and the best applied use of MongoDB 4.2 features will win $1000 of Atlas credits. The challenge will run until the end of November, providing ample time for participants to submit their entries without having to use Google logins.