If there was one thing, one icon that represents your business, what would it be? Hopefully, you said your logo. Your logo is what identifies you to the world. It should be able to stand on its own and communicate to your customers trust and professionalism.
So why do so many businesses forsake this one representation of their company? Most people attempt to throw something together themselves and it usually winds up having adverse effects to their business. But unless you are a branding and design expert, you really should leave the logos to the professionals.