Facebook was first seen as a way individuals could connect with past and current friends but since then it has evolved in to something that now many businesses use for marketing purposes. Facebook can work for a number of types of businesses especially if it is a business to consumer type.
When creating a profile for your business on the social media sites such as Facebook, you should ensure that you set it up correct so it is easy for customers to understand what you do. You will need to add images to your profile which should reflect your business and what you do.
Once you have an active profile you need to start gaining followers, the best way to do this is to promote the link to your Facebook profile in as many places as possible such as on your own website, on any promotional material such as leaflets and sign written cars / vans.
Knowing what to write on your Facebook business account can be hard, there are some great online marketing companies out there that will advise you on frequency and content to use.