Watch the Sweep Picking online guitar lesson by Chris Buono from 60 Electric Guitar Techniques You MUST Know
Sweep picking provides you with a more economical way to pick one-note-per-string or combos of one-note-per-string and two-note-per-string instances up and down the string register. Not to be confused with raking, the idea here is to fret and ring out every note clearly (no cheating!). To do this, it's of paramount importance you approach this technique slowly and be very critical of each note's clarity. When starting to sweep pick, start with a locked wrist and don't be afraid the experiment with varying pick widths.
Looking for inspiration? Start with Frank Gambale and Tosin Abasi and go from there. Don't forget our own Rusty Cooley
as well. While you're at it, be sure to check out my Guitar Gym: Sweep Picking
course for a collection of workouts to help get your sweep picking technique off to a good start.