If you use your Facebook profile for your personal life and your Facebook business page for your professional life, you don't want to be commenting as "you" when you interact with fans of your page. Facebook lets you comment as your business page's identity instead of your personal profile, but you must have at least 25 fans for this option to become available. When you use Facebook as your business page, you can "like" content, make comments and post on walls.
Navigate to facebook.com and log in to the account that is also the administrator account for your business page.
Type the word "Pages" into the search bar at the top of your homepage and select Facebook Pages from the pop-up results window.
Click the "Pages I admin" link in the top-left corner of the page. Click the link for the business page you want to use.
Click the "Use Facebook as [insert your page name]," located in the right column of the page underneath the listed administrators for the page. When you like, comment and post updates it will now appear as your Facebook page. Click the link again to go back to your personal account.
Navigate to facebook.com and log in to the account that is also the administrator account for your business page.
Type the word "Pages" into the search bar at the top of your homepage and select Facebook Pages from the pop-up results window.
Click the "Pages I admin" link in the top-left corner of the page. Click the link for the business page you want to use.
Click the "Use Facebook as [insert your page name]," located in the right column of the page underneath the listed administrators for the page. When you like, comment and post updates it will now appear as your Facebook page. Click the link again to go back to your personal account.