In Scripture, a change in name always occurs at a highly significant point in a person's life. The return of Jacob to Canaan was a significant event in the history of the Hebrew people.
The covenant God made with Abraham is repeated here. It indicates that all of Jacob's descendants will inherit the promises of this covenant. (See: [[rc://en/tw/dict/bible/kt/covenant]] and [[rc://en/tw/dict/bible/kt/inherit]] and [[rc://en/tw/dict/bible/kt/promise]])