Provides a shortcode that allows you to insert permalinks into your content.
The ID for a post or page can be found in just about any Edit link for that content. All you need to do is hover your mouse over the link and look at the tooltip that displays the URL (where this appears depends on the browser you're using). An example:
In the above example,
123 is the ID of the post. This is the number you want to use for the shortcode's
wpid attribute, like so: