What does Genesis 28:13 mean?

Suddenly, the LORD was standing right there beside him and said, 'I am the LORD, the God of your grandfather Abraham and your father Isaac. I will give you and your descendants the land where you are lying right now.' Genesis 28:13 - Modern Text Bible

(God personally appears to Jacob, identifying himself as the God of his ancestors, and promises to give Jacob the land he's sleeping on. It's a direct, personal encounter.)