Flamenco guitar traditionally uses the fingers to play the strings instead of a pick as steel string and electric guitar players use. Some flamenco players use a pick and it is more rare, but it does give them the ability to do quicker tremolos.
The diagrams below show how the fingers on the left and right hand are identified. The labels are for right-handed guitar players. If you are left-handed, then you reverse the hands below.
Note that the length of fingernails play an important part in the ease of play and tone of the strings.
The Left Hand
The left hand is used to press the strings against the fretboard to determine which note is being played. It is important to have short nails on this hand in order to be able to press the tip of the finger firmly against the fretboard, otherwise a "buzzing" sound may occur.
Example, if the TAB music shows 1, then play the index finger.
If the TAB music shows 2, then play the note with the middle finger.
The Right Hand
The right hand is used to play (pluck) the strings. Mulitple strings can be played at the same time (chords) or they can be played one at a time. The nails on the right hand need to be a little longer because the tone of the note is better when played by the harder nail.
The letters do not make as much sense in English, but they make more sense in Spanish:
p = pulgar (thumb)
i = indice (index finger)
m = medio (middle finger)
a = anular (ring finger)