Google Code Jam is an annual programming competition hosted by Google. It challenges participants to solve complex algorithmic problems within a limited time frame, typically over several rounds. Contestants can compete individually and are ranked based on the accuracy and efficiency of their solutions. The competition attracts programmers from around the world, ranging from students to experienced professionals. Participants can use various programming languages to tackle the problems, which often require creative thinking and strong problem-solving skills. The top performers may receive prizes and recognition, including opportunities for employment at Google.