To print a single photo to an AirPrint enabled printer, tap , then tap Print. To print multiple photos while viewing a photo album, tap Select, and tap to select the photos you want to print. Tap , then tap Print. More: AirPrint Basics
To share to Twitter, Facebook, Flickr, or Vimeo directly from the Photos app, sign in to your account in Settings. Then, just tap in Photos or any other app that supports sharing photos and videos.
When you’ve identified a location, tap to share it. Choose whether to share the Selected Location or your Current Location. Tap Message to include the location in a text or tap Mail to send an email. You can also share with Facebook, Twitter or with another iPhone using AirDrop.