Idle and most false imposition

After reading act II of Othello. One point stood out at me. Cassio talks about how he has lost his reputation. Iago gives the definition of reputation as an "idle and most false imposition, oft got without merit and lost without deserving. You have lost no reputation at all, unless you repute yourself such a loser." this makes me think of why people are so obessed with their reputation. For example, I remeber when I was going into ninth grade at Okemos High School. It took me days to think about what outfit I should wear so that I could be in the right crowd. Another memory that pops in my head is when my brothers used to do something wrong, my father would yell, "Didn't you think about your reputation or ours as a family?" Repuations are not important but still kids, adults and parents worry about what people think of them or their family members.
Therefore I think Iago is right when he says an reputation is an idle and most false imposition" which means a thing artificially imposed and of no real value. You as a person should make up your own reputation, something strong that gives you confidence! So when someone does try and "ruin" it you know what you think of yourself and what your true reputation is.