The platform looks a lot like Twitter, with a feed of largely text-based posts - although users can also post. Threads is a new app from the parent company of Facebook, Instagram and WhatsApp.They'll be able to view the history of the chat from when they were a member, but won't be able to react to. To remove someone else from a group chat: From the list of participants, hover on a person's name and select X to remove them from the chat. To leave a group chat, go to the chat header and tap More options > Chat details > Leave chat. To edit or delete any message that you have sent to a chat or channel, go to the message and select More options > Edit or Delete. Once the chat has begun (either group or one-on-one), just choose it in the chat list to open it and then send more messages. Delete messages in google chat Send more messages.