A temple is literally the house of the Lord, reserved for ordinances of eternal significance. Those ordinances include baptisms, marriages, endowments, and sealings.
The temple is closed on the Sabbath so that people can attend church and be with their families on that hallowed day.
We must qualify for admission to the temple. We prepare physically, intellectually, and spiritually.
In the temple, all are dressed in spotless white.
Obedience to the sacred covenants made in temples qualifies us for eternal life—the greatest gift of God to man.