The Share charm is a quick way to share files and info with people you know and to send info to other apps. It's available anywhere in Windows 8 and Windows RT, so you don't have to stop what you're doing to share things like your latest vacation photos, a link to an article you're reading, or directions to a restaurant. You can share with just a few people at a time, update your entire social network, or send info to another app to refer to later.
When you come across something you want to share in one of your apps, here's how to use the Share charm: