Swim team standings come from meets. In a dual meet, the top finishers in each event score points for their team — more for first than for second — and relays are usually worth more than individual events. The team with more points wins the meet. The exact points per place come from your league or governing body, and they differ between dual meets and championship meets with more teams.
If two swimmers tie for a place, they share the points for the places involved: a tie for second splits the second- and third-place points evenly.
A season table counts meet wins and losses, with total team points beside them as the tiebreaker. Individual swimmers are tracked separately, on personal bests and qualifying times.