TL;DR:
Microsoft: “The in-context stores are found in menus throughout the Teams experience that let users discover and install apps that support the specific context the user is in. For example, when a user opens the Message extension (ME) in-context store they are shown a selection of apps that have the ME capability. Discovering apps in the in-context Store keeps users in their flows and avoids unnecessary context switching”.  Due late January to late February 2023.

Details:
Benefits:

  1. Discover and get apps for a specific capability without moving away from that screen
  2. Easily navigate to the Store if you can’t find what you are looking for in the in-context Store
  3. Search for apps for a specific capability in the entire Store catalogue
  4. Launch apps you have already have, from the in-context store
Launching Tabs in-context Store from a group chat
Tabs in-context Store
Messaging Extension flyout
Messaging Extension In-context Store
@mention flyout in a channel
Bots in-context Store

Availability:
Between January and late March 2023.

Source, related links, and references:
MC501986.

Page originally published:
26th January 2023 and kept up to date.