Once you create a Facebook page you receive a free platform to promote your activities and business on a daily base. You can post any business updates. Facebook is more of a kind marketing platform on which you can even expand your business to a targeted audience. It helps in building brand loyalty and increasing website traffic by boosting SEO.
The benefits of a Facebook page are almost none. You need to advertise, if you want new customers and for that you need to have a budget. You can share the page on your wall or messenger but you will be better served if you just contact them.