Similarity displays a list of posts similar to the current post with similarity being determined based on tags, categories, or both.
As of version 1.3 the plugin allows for similarity to be calculated on a combination of tags and plugins using the
sim_by_mix(); command. You can set the way the lists are combined using the relaive mixing weights. You can also use the
sim_by_cat(); commands together to generate different lists of related posts.
If you use the 'Show one more random related post' option the last item in the list is random and does not consider the standard minimum strength limitations. You can set a separate minimum strength level for the random post.