The standard grips this chord is usually shown with.
Abaug is Ab, C and E, a augmented triad. The shape this page opens on is written 43211x, lowest string first.
Note by note. Ab is the root, C is the major third and E is the sharp fifth.

Also written Ab+, Ab(#5) or Ab augmented. The same chord either way; which spelling you meet depends on who wrote the chart.
There are 8 common shapes for Abaug on the guitar, and 46 derived voicings in the triad family.
One note away. Change a single note of Abaug and you have Ab (with one note moved), Abmaj7#5 (with one note added) or Abaug7 (with one note added).
The common shapes, written lowest string first: 43211x, 4x6554, xx6554, x-x-10-9-9-8, x-11-10-9-9-x, x-11-x-13-13-12, x-11-14-13-13-x, x-x-x-13-13-12.
Under the hand. None of the shapes for Abaug uses an open string, so every one of them is movable; the lowest sits at the 1st fret. None of them needs a barre. Together they cover the neck from the 1st fret to the 14th.
Triad. Three notes across one string set. Abaug has xxx110, x321xx, xx211x, x3211x, xx2110, 0321xx, 432xxx, xxx554.
What kind of chord this is. Abaug is a augmented chord — root, major third, sharp fifth. augmented chords on every root, and what they are for.
The common shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.