Windows 10 Redstone is a codename used by Microsoft for a series of updates to the Windows 10 operating system. These updates were part of a broader update strategy to introduce new features, enhancements, and improvements over time rather than releasing a completely new operating system version. Here is an overview of the Redstone updates:

1. Redstone 1 (RS1): Officially known as the Windows 10 Anniversary Update, released in August 2016. This update introduced significant features such as Windows Ink, improvements to Cortana, and a more refined Start menu.
2. Redstone 2 (RS2): Known as the Windows 10 Creators Update, released in April 2017. It focused on creativity tools and features, such as Paint 3D, new gaming features, and enhancements to the Edge browser.
3. Redstone 3 (RS3): Called the Windows 10 Fall Creators Update, released in October 2017. It added features like the Fluent Design System, improvements to OneDrive Files On-Demand, and enhancements to mixed reality capabilities.
4. Redstone 4 (RS4): Known as the Windows 10 April 2018 Update, released in April 2018. This update brought features like Timeline, Focus Assist, and enhancements to the Edge browser and Cortana.
5. Redstone 5 (RS5): Officially named the Windows 10 October 2018 Update, released in October 2018. It included features such as a new clipboard experience, the introduction of the Your Phone app, and improvements to Microsoft Edge and Game Bar.

These updates were part of Microsoft’s “Windows as a Service” model, which aimed to keep Windows 10 continuously updated with new features and security improvements without requiring users to purchase new versions. Each Redstone update brought significant enhancements and new capabilities to the Windows 10 platform, reflecting Microsoft’s commitment to evolving the operating system based on user feedback and technological advancements.