Historically, Sukkot commemorates the forty year period when the people of Israel lived in the desert after exodus from Egypt. Agriculturally, Sukkot is a harvest festival which thanks God for a good crop.
Along with Passover and Shavuot, Sukkot is considered a pilgrimage festival. These festivals were set aside in biblical times for people to travel (or make pilgrimage) to the ancient Temple in Jerusalem and to offer a personal sacrifice for thanksgiving. It is no longer obligatory for the Jewish to make this pilgrimage or sacrifice, and as such, not many Jewish individuals keep this aspect of the festival tradition.
Originally, Sukkot centered on celebrating the yearly harvest following learned pagan traditions. Since such celebrations did not follow the moral and value guidelines of the rabbis, the rabbis decided to use the following from Leviticus to give this celebration Jewish