The standard grips this chord is usually shown with.
Bbaug is Bb, D and F#, a augmented triad. The shape this page opens on is written x1x332, lowest string first.
Note by note. Bb is the root, D is the major third and F# is the sharp fifth.

Also written Bb+, Bb(#5) or Bb augmented. The same chord either way; which spelling you meet depends on who wrote the chart.
There are 8 common shapes for Bbaug on the guitar, and 45 derived voicings in the triad family.
One note away. Change a single note of Bbaug and you have Bb (with one note moved), Bbmaj7#5 (with one note added) or Bbaug7 (with one note added).
The common shapes, written lowest string first: x1x332, xxx332, x1433x, 65433x, 6x8776, xx8776, x-x-12-11-11-10, x-13-12-11-11-x.
Under the hand. None of the shapes for Bbaug 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 13th.
Triad. Three notes across one string set. Bbaug has 210xxx, 2103xx, xxx332, xx0332, xx4332, x543xx, xx433x, x5433x.
What kind of chord this is. Bbaug 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.