Related Post Inside plugin allows you to insert related posts inside of Posts. Related Post Inside plugin will make your website more SEO friendly by insert related post automatically.
Need some extra configurations for Related Post Inside Plugin (if you want it more useful for you). Related Post Inside Plugin allows to change the "Related Post" Title, Number of posts to show, order and Order By. With the activation of Related Post Inside a settings section named "Jewel Theme RPI" will be created. For use this plugin a shortcode [rpi] will be needed.