How to Sync WordPress and Facebook: 14 Steps

If you have a WordPress site, and you keep your blog updated, you probably want to spread the word through the Internet. A good place to start is Facebook. You can actually sync your WordPress and Facebook accounts so that, every time you post an article on your WordPress site, a link is automatically shared on Facebook.
Method1
Using Jetpack to Link your Facebook Account
If you have a WordPress.com site, you have Jetpack installed. If you have a self-hosted WordPress site, you can easily install Jetpack by creating a WordPress.com account and then syncing your self-hosted site to WordPress.com. In either case, Jetpack can be found or activated by clicking on Jetpack on the menu on the upper-left side of your WordPress dashboard page.

Source: How to Sync WordPress and Facebook: 14 Steps