The document summarizes Couchbase Server use case for the mobile game Cookierun by Devsisters. Cookierun is a popular mobile game in South Korea with over 16 million downloads. It uses Couchbase Server alongside other AWS services for its infrastructure and software stack. Couchbase provides high performance for getting and setting game data and scales out easily to handle peaks of 3-4 times normal traffic. While Couchbase works well for this use case, the document notes it is not as popular or well documented in South Korea as alternatives like Redis.