A lot of businesses are using Facebook. Facebook gives businesses a great opportunity to promote their products and services. However, a Facebook page should not be seen as a substitute for their own website.
Some businesses don't even bother with their own website, preferring to use their Facebook page. Indeed some businesses that do have their own website focus more on building their Facebook fan base and updating their Facebook page and forget about their own website.
Your website should be the main hub your online presence. All your blogging, news and events should be focused on your own website. Then simply post the web address of your piece of news on your Facebook page to let all your friends and fans see it first. The best plan is to use Facebook to communicate with customers and potential customers and then send them to your own website to see your news and offers.