Custom fields can be used to add extra metadata to a post that you can use in your theme. Custom fields can be used to add extra metadata to a post that you can use in your theme.Custom fields can be used to add extra metadata to a post that you can use in your theme.Custom fields can be used to add extra metadata to a post that you can use in your theme.Custom fields can be used to add extra metadata to a post that you can use in your theme.Custom fields can be used to add extra metadata to a post that you can use in your theme.Custom fields can be used to add extra metadata to a post that you can use in your theme.Custom fields can be used to add extra metadata to a post that you can use in your theme.Custom fields can be used to add extra metadata to a post that you can use in your theme.