Usually the larger and older the site, the better it will perform in the search engines too, so you will get more visitors too. You will want the website to inform your customers of any changes at your business, any new products you may sell, any related market news, and any other information that you feel may be of interest to people on your website. If someone visits your website one day, and then they visit again a month later to find that nothing has changed at all, what will be the point of your website. They won`t have anything new to read, and may feel unimpressed that you`ve put no effort into updating your content, and so won`t ever return. By keeping the site up to date you are keeping it relevant and fresh, so you will start to have repeat visits and maybe repeat customers too. Normally a good website designer should be willing to update your sites content.