Car will not start, battery good, plenty of gas. on 2000 Volkswagen Passat

turn the key and sounds like it wants to start, any ideas or suggestions?

Asked by for the 2000 Volkswagen Passat
Most people turn the lights or radio on and think the battery is good, Until the battery is load tested you won't know if the battery is good. Have it tested at Napa Sears Autzone etc or buy a new battery