The E-flat major triad, more commonly called the E-flat major chord or simply the E-flat chord for short, consists of the notes E-flat, G and B-flat. Here it is on the treble clef staff:
... and on the piano:
Let's see it on the bass clef staff:
Here is the above chord on the piano:
As a major triad, the E-flat chord consists of a major third plus a minor third. The interval from E-flat to G is a major third, while the interval between G and B-flat is a minor third.
If the root of the E-flat chord—E-flat—is the bass note (i.e., the bottom note), then the chord is in root position:
If the third of the chord—G—is the bottom note, then the chord is in first inversion:
If the fifth of the chord—B-flat—is the bass note, then the chord is in second inversion. (B-flat is called the fifth of the chord because the interval from the root E-flat to B-flat is a fifth.)
If the notes of a chord are played one after the other, the chord is said to be arpeggiated. Here are the standard fingerings for arpeggios of the E-flat chord. Make sure you learn these fingerings!
(If you don't understand the below notation, you should start with my How to Read Sheet Music course.)