Today I was playing a piece of guitar music, and found this on the staff (inside a red circle):
What is the name of it and what does it do?
As always, I recommend bookmarking dolmetsch .
caesura (sing.), caesurae (pl.), fetura, 'tramlines', or 'railroad tracks: usually placed on or above the top line of a staff or stave (not to be confused with the 'simile' mark). A term derived from poetry, caesura is a silent pause somewhere in the middle of a piece of music