Beta testers are individuals who help evaluate a product before its official release. They use the product in real-world scenarios to identify bugs, usability issues, and other improvements. This feedback is crucial for developers to enhance the product's quality and performance. Typically, beta testing occurs after the initial development phase and before the final launch. Companies often invite a select group of users, sometimes from their existing customer base, to participate. This process helps ensure that the product, whether it's software, a game, or an app, meets user expectations and functions effectively in various environments.