Let’s start with the most obvious question first. This is what an “unfurl” is: Those handy little previews you see when you paste a link into a Slack message are what we refer to as unfurling internally at Slack (and also in Slack’s API documentation). While it may sound like a made up bit of tech jargon, it’s an actual word that means “to spread out from a rolled or folded state” which is what Sl