乔迁 is a formal/literary word for moving house. In everyday speech, people say 搬家 (bānjiā). 乔迁 is mostly seen in congratulatory phrases like 乔迁之喜.
history
Originally from the Book of Songs (诗经): a bird moving from a dark valley to a tall tree. The metaphor of upward movement gave 乔迁 its meaning of moving to a better place.
