The 'Post Type Archive Link' plugin is all about simplifying and enhancing user navigation on a WordPress site. Before diving into the details, it's crucial to understand the concept of 'post types'. In WordPress, a 'post type' is a way to categorize data in the CMS. For instance, 'pages' and 'posts' are two standard, built-in post types. However, WordPress also provides the ability to create custom post types for more intricate categorizing needs. Therefore, one might have custom post types like 'books', 'movies', 'podcasts', etc., apart from the standard 'pages' and 'posts'.

Now, coming back to the plugin in question, the 'Post Type Archive Link' plugin allows users to generate a link to any of your post type archives. This feature is a boon particularly for those who have custom post types and want to provide a direct link or navigation point to an archive of all posts under that type. For example, if you have a custom post type 'recipes', this plugin will enable you to create a link to an archive of all 'recipes'. It could be included in your navigation menu, providing your site visitors easy access to all your recipe content at once.

The functionality provided by the 'Post Type Archive Link' plugin is perfectly integrated within the WordPress framework. Its working is seamless and unobtrusive. Once installed and activated, its functionality extends to the ‘Appearance > Menu’ section of your WordPress dashboard. Here, a new tab appears by the name of 'Post Type Archive', under which you can view all your post types. When adding a new menu item, you can simply select one from this tab, and a link to the archive page of that post type will automatically be added to your menu.