Take Control of What Posts on Your Facebook Page

Login to Facebook (picture shows on a computer, not on a smartphone or tablet)
Click on the down arrow or down facing triangle - top right of the page...

Here you will find the option Settings
Click on Settings

Here is where you take control of your Facebook page - I'll touch on a few...

Change your password, stop unwanted posts to your timeline and more...

General - change your name, primary email account and Facebook Password

Security - Trusted contacts is a good one to think about. Take a look at Where You are Logged In. Legacy Contact...lots of choices to think about and update on the Security tab.

Privacy - Who can see your posts

Timeline and Tagging - Here is where you change the options to ONLY YOU can post to your timeline

Followers - Who is "following" you and not your "friend"?

Ads - Make sure you click on this tab. Read what Facebook is wanting to do with your name and activity. Click on the EDIT button and change the option to "No One". Default is set to "Your Friends".

...Take a look at each of the tabs in the Settings... 
TAKE CONTROL!

Timeline and Tagging 

Select Timeline and Tagging
Click on the Edit button on the right side and change the option to 
Who can post on your timeine? "Only Me" 
Review posts friends tag you in before they appear on your timeline? "On"