It is a good practice to fill up the ‘About’ section on your page thoroughly, giving away a lot of useful information. It will convince your user that you are serious about your Page and also allow them to connect with you in multiple ways. At the least, your Page’s About section should contain a brief description of what your Brand is about, your Website URL, Email, Phone number and Postal address. Optionally, you can list a host of other information including links to the Facebook profiles of the Page Owners, giving a comprehensive view of what you do.
Check out this fantastic Page of Joseph Bushnell, the marketing whiz from London. This Page is a great example for a lot of best practices.