At the bottom of every post, there are four choices: Reply, Boost, Like, and Options.
• Reply lets you, you guessed it, reply. The number will show either zero replies, 1 reply, or 1+ replies.
• Boost lets you amplify a post. It will only show up in the feed of those who are following you.
• Like is how you express approval for a post. It's good to be generous with these.
• Options is where you can expand the status, mute the conversation, and other things.
@CoSoTips @shadowpages Heh, I just learned something new :-) Boost only reposts the message to your followers.