API Rate Limiting is a technique used to control the number of requests a user can make to a web service within a specific time frame. This helps prevent abuse, ensuring that the service remains available and responsive for all users. By setting limits, providers can manage server load and protect against potential attacks. When a user exceeds the allowed number of requests, the API will typically return an error message, indicating that the rate limit has been reached. This encourages users to space out their requests and promotes fair usage of the service, ultimately enhancing the overall user experience.