Facebook is a great marketing tool for many businesses. Depending on your type of business, Facebook may be used in a number of different ways. For businesses, often they get the most out of Facebook when using the paid for advertising route. This allows them to create an ad or number of ads that will be shown to numerous people on their feed. These ads can be targeted to different groups of people based on their age, location, interests etc. This often makes the ads very effective.
If you are just using Facebook as a business and not doing paid for ads then you will have to start trying to build up a community of followers yourself. You may wish to join groups in which you can post in to spread the news of your Facebook page. All business accounts have to be linked to a personal account and many groups can only be posted in by a personal account. You will need to share posts from your business page using a personal account. This may not generate sales directly, but can build up brand awareness and increase traffic to your website.