What is the advantage of buying the "body side molding" on a new honda cr-v?

I don't know what it is. Is it worth purchasing from the honda dealer? What are other alternatives?What is the advantage of buying the "body side molding" on a new honda cr-v?It's worth getting it from the honda dealer . What's it's purpose ? So when you park your new car in a parking lot and some jerk opens his door and slams your car you only scratch or dent the protective bodyside moulding and not dent and scratch you new cars doors.