A E Minor chord contains the notes E, B, G. It is built from the minor formula 1 - ♭3 - 5, with E as the root.
Is E minor the easiest guitar chord?
For most beginners, yes. E minor needs only two fingers, mutes no strings, and lets all six ring out — so it sounds full even with imperfect technique. That immediate payoff is why it's so often the first chord taught.