Contextual Related Posts – Related Post Plugins For WordPress
Contextual Related Posts uses a custom algorithm that pulls keywords from each page’s title and main body content. This is a lot more intensive than other plugins, but it also delivers more unique results.
Once you get this installed, it’ll automatically start pulling related posts based on the page content. You can add the shortcodes anywhere you like or append the related post function inside your template files.
I also like how this plugin comes with its own unique caching system. However, that means even if you have another caching plugin installed, like W3 Total Cache, you’ll need to clear both caches to reset your related posts.
This approach certainly cuts down on page size but can be a pain when you’ve got a massive website.
credit : WebberZone