Linking your Facebook account to your Twitter account makes it even easier to share your thoughts with your friends and followers. Follow the simple instructions in this article if you'd like to learn how to do that.
Step 1. Go to this link
Step 2. Click on "Link your Facebook profile to Twitter"
Step 3. Click "Authorize App"
Allows your Facebook account to post messages to your Twitter account.
Step 4. Make the necessary adjustments to the settings
You should see a notification stating that your Twitter account is now linked to your Facebook profile. The following checkboxes are automatically checked: status updates, photos, notes, videos, links, and events. If you don't want to associate any of these things with your Twitter account, you can uncheck the box and click "Save Changes".