Have you ever felt that there is something missing in your post or pages? A subtitle perhaps? If you need a subtitle in your post or page, we got you covered.
All you need is a simple plugin called, Secondary Title. Upon activation you can automatically see a new field below the title post of your edit screen.
You can also use the page or another custom post type. This plugin comes with its own configuration which allow you to fine tune how the titles are displayed in the admin area in your WordPress theme. If you want to change the options, just configure it in Secondary Title settings in the admin menu.
Read the rest of the post here: http://www.wpbeginner.com/plugins/how-to-add-subtitle-for-posts-and-pages-in-wordpress/