Full integration of the Steam News Hub is now complete and available to everyone on Steam. The old news page has gone away, making the Hub the source for Steam news. Through the service, players may browse a personalized Hub to easily find updates, news from dozens of news organizations, announcements, and events for the games they play and/or have an interest in following. Includes options for receiving email and mobile alerts.
A complete write up is available here:
Launched in July 2019, Steam Labs is a place where experimental new features can be introduced early in development, tested, and developed in conjunction with the community.