I am a firm believer that first impressions matter. I try to look nice for in-person client meetings. I speak professionally and with humble authority (as best as I can). And I make sure I'm clear about my value to a client's business. Bad first impressions frighten clients away. Good first impressions instill trust.
Maybe you don't leave your office. Maybe your profession doesn't require you to be in-person at events or meetings. But you send emails and take phone calls. You have marketing material of some kind. You have contracts and forms and the work itself. Those things speak about you to the other person. You may not intend it, but they do.
Curate your presentation and craft your image. Do so with care, and your business will respond.