What does Exodus 12:11 mean?

Here's how you should eat it: be dressed and ready to go, with your sandals on and your walking stick in hand. Eat quickly. This is the Lord's Passover. Exodus 12:11 - Modern Text Bible

(God wants them to be ready to leave at a moment's notice. The meal isn't a relaxed celebration—it's a sign that something big is about to happen, and they need to be prepared.)