What does p0h mean on a guitar tab?

The notation "p0h" in guitar tablature means "pull-off" on the 0th fret. This technique involves picking a note on a certain fret and then quickly pulling the finger used for that note off the fretboard, allowing the string to vibrate freely and produce a higher note. The number "0" indicates the fret where the note is initially picked, and the "h" stands for "hammer-on", which is the technique of quickly hitting a note on a lower fret after picking a note on a higher fret, creating a smooth transition between the two notes. In the case of "p0h", the hammer-on is not explicitly mentioned, but it is implied as part of the pull-off technique.