What does Deuteronomy 16:5 mean?

Don’t eat bread with yeast during this week. Eat only unleavened bread—the bread of hardship—because you left Egypt in a hurry. This way, you’ll remember every day of your life how you left that place. Deuteronomy 16:5 - Modern Text Bible

(Unleavened bread is a symbol of the rush and struggle of leaving slavery. Eating it keeps the memory alive.)