This is a content page. Very simple and will generally be the most common page type you will find in Umbraco.
How to Create a Content Page
Enter the "content" section by clicking the top button labeled "content" in the black spine located to the far left.
From there, hover over the line labeled "411 sites" in the white panel located directly to the right of the black spine you clicked on in the previous step. Hovering over "411 sites" will reveal three dots located slightly off to the right, click these dots. A new panel will expand out to the right will a list of different items you can create under the current item. You can also click on a button labeled "do something else" located at the bottom right of that panel, however we are going to ignore this for now and click on the "Content Page" line located near the top. This will refresh the main panel in the center of the interface and should automatically redirect you to the new content page you created.
We will want to give that page a title, do this by entering a title into the field located at the top that states "Enter name". After this is done, click the save and publish button located at the bottom right of the screen.