Your page visitors can publish on your page and their posts appear on the Visitors Posts when you click on Posts at the left section of your page. This occurs when you allow it as the admin and also if you allow photo and video posts it will appear in the Photos and Videos sections of your Page.
Whatever you allow is what will appear on your page. The good news is that you can set how you want it to be and we are here to guide you on how to achieve that.
How do I control who can post on my page