Updated: Apr 2
This question can be answered in one word ... Credibility.
A website gives your company credibility and shouts to the world that you are here and you have services and products that can enhance the viewers world. It identifies all the particulars that you have to offer. And it lets everyone know instantly that you mean business.
Can you design a website yourself. With the templets available today, most people can design a website. Will it be unique in the marketplace today? Maybe not if you use a templet. Will it sell your company and services? It may be beautiful and still NOT sell what you have to offer. But ... you do need a website and it is where you start with your business.