Forum:Tutor?

What does it mean to be able to "Tutor" a card? I hear the term a lot.

Like right on the main page, the featured card says " "Geargiarmor" is a card boasting a hefty 1900 DEF for a Level 4 monster, and allows you to search for any "Geargia" when it's flipped face-up! This allows you to tutor "Geargiaccel", another Level 4 monster who's eager to get onto the field -"

What does it mean?Trak0don (talk • contribs) 15:06, April 17, 2012 (UTC)