The plugin helps to change and rotate the title of your blog dynamicaly. Either random or following a list, changing every time, hour, day, etc.
Just use the "Add New" button in Plugin section of your WordPress blog's Control panel. To find the plugin there, search for 'Rotating Blogname'.
After activating the plugin in the Plugin section, you will find a Rotating Blogname section in the Settings menu. Here you can specify your blognames and other preferences.