It lets them know that a) yes you did see them and they will be looked after, and b) that you value the customer you are currently working with. It also lets your current customer know that she is not going to be suddenly ditched and have to spend time waiting for a sales associate who doesn't care.
I'm confused about your story with the 'who is next part', but really, the point is moot; serve customers in an order, acknowledge others if you want, but don't ditch the old ones.
Because she felt that your manager should do a better job of training the employees.
She wasnt trying to get you in trouble, she wants you to learn from this experience & not do the same thing to another customer. When a customer is buying jewelry, they have many options and may be spending a lot of money. Good service is expected, or a customer will take their business elsewhere. Take this as a lesson in good sales etiquette & you will do a better job next time this happens.
As far as marketing goes, a customer is 3 times more likely to report a bad experience than a good one. that's why.
dont stress about it. It happens to everyone some.time.or.another id say she felt like since she.was first she deserves to.be served first which is true but I dont see how it was.a big deal
So I work at the jewerly counter at a retail and I was returning an item for a customer and while I was done, I turned around and there were 2 customers behind me which i didnt know, and I said "Hi how are you guys doing" I thought maybe they were still looking and then the lady quickly said she wanted to see something so I went over to her and the other lady I guess went to see the manager and told on me that she felt rude because of me that She was there first before that lady. But before she told on my manager the lady left and she came up front to me saying that I should say "Who is next" and I said sorry, then my manager came to her and said what is the problem , and she explained everything to her..I was like are you serious???why would she even tell my manager,