based on your readings from week 4 materials could you briefly explain and share thoughts on the issue without getting lost in details

Just recently, your classmate asked you “You do remember professor talked about “the concept of elasticity” today, right? I do understand what the formal definition is, but I do not have any clue as to its real life implications, who cares about it and why?; Could you give me an example in such a way illustrates how you understood (in layman’s terms)? For instance, let’s pretend that I am a CEO of American Airlines, why should I pay attention to elasticity?”

Based on your readings from Week 4 materials, could you briefly explain and share thoughts on the issue without getting lost in details?