Output page content
Each page is has one or more content areas that the Pages app or other apps can set content for.
All pages have a main content area. There are two ways to output that area. You can use just the {{ _page.content() }} tag. If you don't pass an area key to that method, then the main content is automatically outputted.
{{ _page.content() }}
Or, you could pass the 'main' content area key.
{{ _page.content('main') }}
You can pass the key for another content area to output that one. Say that you had a content area called Sidebar with a key of sidebar. The following is how you would output the content for that area.
{{ _page.content('sidebar') }}