ChordPro is a method for chord encoding that places the chords inline with the lyrics. It makes lead sheets smaller but it can be hard to read.

The traditional approach for lead sheets looks like this:
G∆ C∆
Handing me a looking glass

A chordpro version looks like this:

Gmaj7]Handing me a [Cmaj7]looking glass
[Gmaj7]You asked me who it was I[Cmaj7] saw

Music programs like GuitarTapp convert traditional lead sheets to Chordpro to make formatting easier.