Because their customers are already on Facebook (spend an average of 25-30 minutes each day on the site), which are significantly more likely to see messages from your brand within your News Feed that do often return to visit their website or any other means on their own initiative.
As fans engage with your page commenting, taste or content exchange, the brand awareness extends to the friends of that person, helping you to reach more customers. Once a user granted permission to contact them by the friendliness of its website, the market may continue for infinity, essentially for free.
The following ten tips for unpaid Favorites:
Basics
Username sure your page
Create a custom landing page
As incentives for participation in competitions
Install a box like on your website
Take advantage of the database and contacts
Suggest your existing Facebook friends page
Promote your Facebook page everywhere
Do not ignore your Biggest Fans
Update, Listen and Participate