The SNS Count Cache plugin, a highly useful WordPress tool designed primarily to aid webmasters in managing, displaying, and keeping track of their social network shares, is essentially a social sharing count caching system. Its role predominantly surrounds caching the count of social shares or SNS counts for your posts, and this setting lets you display the count wherever you deem fit on your WordPress site.

The workings of the SNS Count Cache plugin are simple but ingenious. It is a known fact that various social media platforms have individual APIs that allow one to extract data from these platforms. The plugin capitalizes on these APIs to get data about how many shares a particular post has on various social media. This data is then cached, or in simpler terms, stored temporarily until it is refreshed at a certain interval that the website owner can configure. The advantage of this system is that it reduces the number of API calls, which hence decreases the load on the servers, leading to better website performance.

An intriguing aspect of the SNS Count Cache plugin is its capacity to work seamlessly with virtually all major social media platforms, including Facebook, Twitter, LinkedIn, Pinterest, and more. And this is not limited to just posts; the plugin can count the SNS shares of custom post types, pages, home pages or any URL. The cached data can then be exhibited in different parts of your WordPress site like widgets, posts, and even directly in your theme coding with the use of PHP codes.

The plugin's appearance is customizable according to the website’s theme or the owner's preference. Display, font, settings, and color - everything is adjustable, thus ensuring a smooth integration with the overall look of the website. Moreover, with its shortcode functionality, the SNS counts can be strategically placed at any desired location.

Another crucial fact about this plugin is its availability in different languages such as English and Japanese, making it a versatile tool for global users. Also, its regular updates to conform to API changes in social media platforms underpin its reliability and longevity.