The Feast of Tabernacles (also referred to as the Feast of Booths, Feast of the Ingathering, and Succoth) represents the following:
At its most basic level, it is a celebration of the abundance of God's blessings in connection with the ingathering of the Fall Harvests.
It is a memorial to the Exodus, when the Israelites wandered in the wilderness, living in tabernacles or booths (i.e. temporary dwelling places) in route to the Promised Land. It is therefore a representation of Faith in God's protection and promises.
It looks forward to the great ingathering of Believers after the resurrection and judgment which ushers in the millennial rule of the Messiah on earth.
The Messiah, at his first coming as the suffering servant, was apparently born during the Fall Holy Day period. Just as the booths represented temporary dwelling places, the Messiah was made manifest in a temporary dwelling (body) as He came to tabernacle among us (Jn 1:14). The symbolism of Tabernacles (the 7th Festival) may ultimately be fulfilled when He returns at His second coming to again tabernacle among us as King of Kings and millennial ruler from New Jerusalem, to finally provide a "Sabbath Rest" for all mankind and the earth.