For a business, either small,or large, a website can help you get more customers and increase sales. A website will allow you to showcase your product or service using photos or video, it helps you communicate with your customers more efficiently, provide information to them quickly, sell products or services online, improve customer service and much more.
With a website, you have the ability to reach a broad audience 24 hours a day, 7 days a week. Most people will start their search for a product and service online, a lot of times this search occurs outside normal business hours. In a survey by The Nielsen Company, 81% of web buyers cited the "ability to shop anytime during the day" as the reason they chose to shop online. Other popular reasons for shopping online included saving time, the ability to comparison shop and find things easily.
However, a website is not just for online shopping, in many cases, you may not have a need for customers to buy your product online, however a website has the ability to generate leads, sales or inquiries without you even being there. It also allows you to be found by search engines, use online marketing services, or supplement your existing marketing materials or advertising by allowing you to include your web address on your business cards, store window, flyers, post cards, etc.
By supplementing your existing advertising with a website, you can increase its effectiveness, allowing a potential customer to see additional information about your products and/or services and therefore increasing your ROI (Return on Investment) on your existing offline marketing efforts.
We can go on forever on how a website can help your business in many ways, so to make it short, there is almost no situation where a business should not have a website. As the internet continues to become even more mainstream, having a website will be a requirement for any business to make it and compete in the marketplace.