Watch the Major Barre Chords online guitar lesson by TrueFire from Play Blues Guitar 2: Rhythm & Lead Fundamentals
Barre Chords are one of the most essential things you will learn as a guitarist. They allow you to play chords up in different places on the neck, move songs to different keys, and put solos and chords in the same positions. Practice these barre chord shapes until you have them down. If they seem hard at first, don't let that stop you - these are a "must know" skill that you have to be able to do.