The document provides information about guitar strings and their tuning. It discusses that a guitar should have 6 strings, labeled from thickest to thinnest as E (6th string), A (5th string), D (4th string), G (3rd string), B (2nd string), and E (1st string). It then provides a method for relative tuning where each subsequent string is tuned by fretting the previous string at either the 4th or 5th fret and matching the pitch.