There are several elements to having a good web presence.  You need a website, a mobile website and a Facebook business page.  Today, just having a good website isn't good enough.  Google and other search engines will drop your site ranking if you don't have a good mobile website.  That's because most people use their phones and tablets to search the web.  Facebook business pages also help, because your followers will see your updates automatically.  SEO (Search Engine Optimization) is also a key factor.  There are a lot of good looking websites that don't resolve well when people are searching for a product or service.