The term signifies a pre-release version of Apple’s mobile operating system, iOS 18, made available to the general public for testing. It represents a build considered relatively free of critical errors, allowing users to experience and evaluate new features before the final, polished version is officially released. Think of it as a trial run for a major software update.
Releasing such a version allows for extensive user feedback, which is crucial in identifying and resolving remaining software issues before the widespread rollout. This process contributes to a more robust and reliable final product for millions of users globally. Historically, such pre-release programs have played a significant role in refining software across various platforms.