Design Spaces are a new way to look at your design work! It aims at bringing all your product design work together in one space. The design space can include your UI Drawings, powerups, design asset files and embeds to 3rd party apps. Moreover, it can be shared with your team in an instant. Work together as a team on different aspects of your product and stay up to date with the real-time updates and notifications when any changes are made to your design space.
Take a look at our sample design space to understand how this new layout can help you - https://wireframepro.mockflow.com/space/MmePNMjLDmb