Especially in some positions dealing with this customer, such as sales, or some business, in fact, you are good-looking and certainly useful.
However, business ability is the most important thing, and appearance is only a plus item. For example, if you have a strong sales ability and you can sell the list, then your boss doesn't care what you look like.
Then there is a special reminder that the interview is actually a special scene. It must be a stranger's contact. That first impression is very important, so no matter what you look like, you must dress yourself up and tidy yourself up, perhaps by wearing good shoes or getting a haircut. This is the first impression. At the same time, it also expressed respect for the company and attached importance to the post.