Game Pass is a subscription service offered by Microsoft for its Xbox consoles and PC. It provides subscribers access to a large library of games for a monthly fee, allowing them to download and play a variety of titles without purchasing each one individually. The service includes popular games from various genres, including indie titles and major releases. Subscribers can also enjoy new games on the day of their release, making it a cost-effective option for gamers who want to explore different games without a significant financial commitment.