Microsoft Teams public preview adds option to pin chat messages
Pin a chat message to the top of a chat in Microsoft Teams - Microsoft Support
Pin frequently used files - Microsoft Support
Add the Power BI app to Microsoft Teams - Power BI
How to pin an application to all Microsoft Teams users - HANDS ON Teams
Join a meeting in Microsoft Teams - Microsoft Support
Microsoft Teams – Pin a Chat for quicker access
How to Pin a Message in Teams Chats and Channel Conversations
Show, hide, or pin a team or channel in Microsoft Teams - Microsoft Support