If you customers ask you about something over the phone or in person, then add it to your website. Your website can be a valuable point of reference for your customers. Rather than getting calls asking the same type of question, allow your customers to find out on your website. Not only does this reduce the number of phone calls you receive, but it also answers to questions of the customers who never called (and most likely found the answer on the competitions website).
Customers will use your website to find out about your business. If you do not have current information on your website, then they will NOT trust it. Keeping your website current gives the impression that your business is active and alive. Recent news about large sales, completed work, new staff members, and industry events. Recent updates are vital to your websites health