Many businesses are reluctant to invest time into a presence on Facebook, because they already have a fully functioning website. However, failing to invest in a presence on the #1 social media site in the world is a big mistake.
https://www.facebook.com/business/
How Facebook works for businesses
You know your business
Whether you sell in person, online or through an app, you know what you’d like to do next as your business grows.
We know people
More than a billion people use Facebook to connect with friends, family and things that matter to them.
Facebook connects businesses with people
Marketing on Facebook helps your business build lasting relationships with people and find new customers.