Microsoft never sleeps. In addition to its steady releases of major and minor updates to the current version of Windows 10, the company frequently rolls out public preview builds to members of its Windows Insider Program, allowing them to test out — and even help shape — upcoming features.
Windows Insiders can choose to receive preview builds in one of three channels. The Dev Channel is where new features are introduced for initial testing, regardless of which Windows release they’ll eventually end up in. The Beta Channel lets you test more polished features that will be deployed in the next major Windows release. Insiders in the Dev and Beta Channels are now testing Windows 11 builds.