Ramban on Vayeshev - "And Yaakov Settled as a Stranger"

This shiur focuses on Ramban’s comments on the first pasuk in the parasha. Though Esav settled in his inheritance, Yaakov lived as a stranger in the land, like his forefathers.  Avraham’s phrase is “Ger toshav” – foreign resident. Why does the text say this? What does it mean to be a “ger” in the land? And why is it important that this is so for Avraham and Yaakov?