This chapter is repetitive and should read as a series of instructions. It is repeated as well to show that Moses was obedient to every detail of Yahweh's command.
This phrase indicates that Yahweh began to dwell within the tabernacle, among Israel, in a special way. (See: [[rc://en/tw/dict/bible/kt/glory]] and [[rc://en/tw/dict/bible/kt/tabernacle]])