What is the new user interface that services like Google/Google+ are using? [duplicate]

1. What is Google's version of Slack?
2. Did Google change their UI?
3. What are the two types of user interface?

What is Google's version of Slack?

Google Chat vs Slack communication 1:1

Both have dedicated spaces for group communication. In Google Chat, they are simply called Spaces, while in Slack, they're called Channels. Now we come to one important difference between these two apps. Namely, Spaces in Google Chat are private by default.

Did Google change their UI?

The company has introduced some changes which put the design of the app in line with Android 12 and Android 13's Material design. The most noticeable change is the introduction of a new tabbed design which includes Favourites, Devices, Automations, Activity and Settings.

What are the two types of user interface?

Types of user interfaces

graphical user interface (GUI) command line interface (CLI)