Watch the Sweep Picking online guitar lesson by TrueFire from Play Rock Guitar 10: Advanced Soloing Approaches
Sweep Picking - Concept 20 is a video guitar lesson presented by Jennifer Batten and is sourced from Rock Sauce For Lead Guitar.
The sweep picking technique is playing notes on two or more adjacent strings with one picking motion. You either sweep all down strokes (lower to higher pitches) or all up strokes (higher to lower pitches), depending on the group of notes you're playing. You get a very different sound and can play groups of notes much faster by sweep picking than you can by alternating up and down strokes.