E7sus2sus4 (Guitar, Intermediate)

To be fair, E7sus2sus4 can easily be stated as D/E.

As E7sus2sus4:
D string = E (root note)
G string = A (suspended 4th)
B string = D (dominant 7th)
High E string = F# (suspended 2nd)

As D/E:
D string = E (alternate bass note, instead of the root note D)
G string = A (perfect 5th)
B string = D (root note)
High E string = F# (major 3rd)

This is essentially a D major chord with an alternate bass note of E.

E7 (Guitar, Beginner)

E7, or E-seventh, is the twangier version of the E major chord:

1. Place your index finger on the G string, behind the 1st fret (G#).
2. Place your middle finger on the A string, behind the 2nd fret (B).
3. Playing all six strings, strum the E7 chord.