Beneath the tab Metadata field, you can choose to either apply the metadata definition on pages, files, and/or images, portlets and/or layouts.
In order to activate the metadata definition on pages, click the plus sign to the right of Metadata fields applied on pages based on this template.
A new window will open Select definition. Select the definition you would like to apply to the template.
Now you have activated the metadata definition for the current template.
If you would like to apply metadata on for instance files you click the name/arrow n next to Metadata fields applied to files stored on the page. Then you click the plus sign to select desired metadata definition.
In order to also apply a metadata field to e.g. portlets on a page, click the name/arrow to expand the field. Then click the plus sign to select which metadata definition to activate.
This function requires a license for metadata on portlets.