Is your website active or asleep? Did you launch it 3 years ago and still expect it to be bringing you business and customers? Do you expect it to be providing the latest information about your business? If you do not keep your website up to date, you could give the impression your business is:
If this is the case, why would this impression encourage your customers to engage with you and spend their own hard earned money with you? The internet and websites plus Social Media allow virtually anyone to keep people updated on what they as individuals, or as companies are up to or are doing.
Adding new items, announcements, news etc to your website not only let's your customers' know you are active and that other companies/people are using your services (ie spending their money), you may also provide information that makes them want to come back and check or to find out more. They may also be interested in hearing regularly from you via email and/or newsletter.
Embracing the Social Media and internet age has never been so easy so grab it while it is there and reach out to your existing and new customers.