Display who has read a message on a channel or private chat
Many collaboration tools, such as WebEx Teams, display an icon for the people that have read a message on a Team chat (channel) or private messages.
It helps people know that your message has been read.
Matt N commented
Agreed! Check out this thread as well: https://microsoftteams.uservoice.com/forums/555103-public/suggestions/39475654-read-receipt-for-channel-messages
Jason Winbolt commented
I'm thinking something like FB Messenger or LinkedIn, where their Avatar moves to the message when they have read the message.