The Fetch API is a modern JavaScript interface designed to simplify HTTP requests with a promise-based syntax, allowing for cleaner and more efficient code in web applications. It enables developers to request data from servers asynchronously without reloading entire pages, thereby enhancing speed and interactivity. The API supports various HTTP methods such as GET, POST, PUT, and DELETE, and facilitates the handling of different data formats like JSON and text. It also provides features for better error handling, simplifying the use of callbacks through chaining methods like .then() and .catch(). Moreover, the Fetch API can be integrated with proxies to enhance security, scalability, and geolocation capabilities, making it a versatile tool for interacting with public or private APIs. Additionally, the use of best practices such as caching responses, setting timeouts, and request throttling can optimize performance and reduce server load. Bright Data offers advanced proxy services that work seamlessly with Fetch-based applications, providing solutions for data extraction challenges, including IP blocks and rate limits, especially in large-scale or geotargeted requests.