What is the difference between @channel, @here, @all in Slack?

Great question! @channel alerts anyone who has joined the channel whether they are online or not. @all alerts everyone in the group, also whether they are online or offline. @here alerts anyone that is currently signed into Slack. 

We prefer that you use @here because Skillcrushers are all over the world and your 2pm may be their 2am!

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