Volleyball standings work on two levels: matches and the sets inside them. A rec league table often just counts match wins and sets won. Leagues that play best-of-five matches usually use match points, and the FIVB system is the common one: a 3–0 or 3–1 win is worth 3 points, a 3–2 win 2 points, a 2–3 loss 1 point, and a 0–3 or 1–3 loss nothing.
That system rewards taking a strong team to five sets. Two teams with the same 2–2 record can be a point apart, depending on how many of their matches went the distance.
Ratios break ties: the sets ratio (sets won ÷ sets lost) and then the points ratio (rally points won ÷ rally points lost). A ratio is used rather than a difference so teams that have played different numbers of sets compare fairly.