What is circle picking for guitar?

Basically you're using the pick to move in tiny circles on your strings, you're barely touching the string allowing speed and touch.

1. Is picking a guitar technique?
2. What is economy picking on a guitar?

Is picking a guitar technique?

Picking Techniques

1. Always point the pick directly down towards the guitar.
2. Do not allow it to spin while picking.
3. Make sure your grip is comfortable.
4. Make sure you have a firm grip.
5. Rest your forearm on the guitar for stability and comfort.

What is economy picking on a guitar?

Economy picking is a guitar picking technique designed to maximize picking efficiency by combining alternate picking and sweep picking; it may also incorporate the use of legato in the middle of alternate picking passages as way to achieve higher speed with less pick strokes.