The put tags indicate the content to be inserted into the template. The layout of the content is determined by get tags placed in the template. The content property indicates the source of the content. The default is false, meaning content is included. If we change the layout of the elements on this page, all pages inserting this page will also change to use the new layout.
All content is optional.
If a source page does not specify the content for an element in the template, that element is simply ignored. This can make using templates more flexible, since you can use the same template for more than one page, simply by ommitting or specifying a content element. However, this feature also means that a misspelled name could lead the template to quietly ignore content you meant to include.