Changing your Facebook password just takes a couple of seconds, so it's a smart idea to alter it whenever you think someone may have accessed your computer, or consistently every couple of months.
If you find viruses or malware on your computer, change your Facebook password. If others have administrative access to your business page, remind them to keep their passwords secure as well.
Change Password In Facebook
Sign in to your Facebook account. Go to Settings > General > Edit, located next to Password.
Enter your existing password followed by the one you wish to be your new one. Click Save Changes to apply your edits:
Tips
Utilize a strong password for your Facebook account. Facebook advises a mix of at least 6 characters consisting of numbers, letters and punctuation marks.
If you can't remember your password, click the "Forgot Your Password" link on the Facebook login screen. Follow the onscreen instructions to recognize your account and reset your password.
Caution
Your Facebook password is not the only point of entry for possible hackers. Anybody with access to the email address you use to visit to Facebook can reset your password and take over your Facebook account. Facebook advises altering your e-mail account password and using different passwords for various accounts.
And one more thing please don’t forget to share this awesome trick to use the Change Password In Facebook with your friends.