By now, many networks employ hashtags during broadcasts in an attempt to encourage second screen engagement.

By now, many networks employ hashtags during broadcasts in an attempt to encourage second screen engagement. But last night, NBC put Twitter in the spotlight in a whole new way: during the final minutes of “The Voice,” viewers were given five minutes to save a singer with a low number of votes by tweeting the name of the artists with the hashtag #VoiceSave. The live voting on the network resulted in high Twitter Nielsen ratings and added a “new energy” to the competition. (MediaPost)