What do all the customers signs mean?

The heart sign means they love your store.
The broken heart means they don't like your store.
The clock above their head means that there's isn't enough room for them to walk or look at different items.
The mirror means you need more mirrors. The mirrors that you put on the walls don't count. The only mirrors they can use are the ones that stand up.
And the dressing room icon above their head means you need more dressing rooms.

Heart means that the customer is satisfied with the store.
Broken heart means that they are not satisfied with the store. It could be that there are not enough dressing rooms or mirrors.
Mirror means that they want to go to a mirror, so they willif one is available. If one is not available, they will have a broken heart and leave. This is the same for dressing rooms too.
Hope this helps! I was confused too, but I think I got it (:

The mirrors on the walls cannot be blocked by counters.

Heart: satesfied
Clock: can't get to clothes properly
Broken Heart: unhappy
Mirror: all mirrors are in use or unreachable
Change Room: all change rooms are in use or unreachable
Add me: PinjPetal3

Mirrors on the wall can be used. My store has them and they work.

Ok, so I looked at everyone's answer to the question "Why do I keep getting broken hearts in my Fashion Story game?" I then went back to my game and paid very close attention to when these broken hearts are actually showing up. They appear after a dressing room or after they have looked in a mirror. With that in mind, I bought several cash registers and I have not seen a broken heart since. I love this game and hope this solution helps others. <3

You have the cash register blocked so the lady can't stand behind it ? Or a mirror on the wall has something in front or underneath it maybe. Even f you have a stool too close to the dressing rooms it will show broken hearts too.

Heart means this: the customers love your stores and want to come back and they also bought something at you're store

Broken hearts mean: that you don't have a good selection and they don't buy anything

Mirrors mean: that they want to Look at themselves in the mirror and see how they look

Dressing room means: they want to try something on