Just like Twitter, Google+ and now Facebook also you can enable Hashtags feature inside your WordPress blog posts too. WordPress Plugins Repository has a new plugin Hashtag. The plugin is easy to use, it automatically converts#Hashtag keywords in to searchable hashtag search link that directs user to search results page showing posts containing the clicked hashtag.
The world’s largest social networking website Facebook now supports hashtags. Hashtags are the simple keywords prefixed with the sign #. Websites like Twitter, Instagram, Google+ and now Facebook also uses them for identifying discussed topics.Users can search for them or simply click them and find posts shared by the users world wide without any limitation of followers, connections etc. For example if you search #wordpress in Facebook, it will show you the posts shared by the Facebook users world wide and this way you can also know what others are discussing about WordPress not just your the people you are connected with.
Showing Tweets relevant to post tags is a very popular feature used in various high ranking websites. This tutorial explains you how you can enable this and few other features for showing Tweets relevant to your blog posts, from a Twitter list or from a Hashtag etc in your WordPress site.