The question above has many possible answers and everyone’s reason will be individual but the bottom line is if you own some kind of business you should definitely be presented somehow in cyber space, no matter whether by your own site or a third-party service like facebook, twitter, foursquare, etc. or through a combination of both.
Whether you like it or not, nowadays the Internet has become an important part of our lives and besides being a fun way to spend our time it could be a valuable tool for connecting businesses with clients.
Thanks to it, they are a lot more informed and do not rely on radio and TV to choose the product or service they need.
Even if your business already has a site, there’s no guarantee that clients will find it or choose your products or services but if nothing about it exists on the Internet, there are no chances that they will find out at all about your business which could only hurt it.