Work in channels
Conversations in channels can be seen and searched for by the entire team. You can participate in conversations, like or save important ones, mention specific people so they see your message, and even edit a file that’s been added to the conversation.
1. Reply to a message
Select 
Reply, add your response, and press Enter.
2. Like a message
- Select
next to a message to show you liked it.
3. Get someone's attention in the channel
Type 
in front of a team member’s name while you're creating a message to include them in the conversation. The person will receive an @mention notice. You can @mention a team or channel, if your admin enables it.
4. See where you've been mentioned
Look for the circle on the left next to Teams and Activity to see the number of times your name has been mentioned in a conversation.
