Activate WordPress Post Formats
By activating this Post Formats Functionality you will be enabling a feature inside your Post Editor that allows the selection of different Post Formats on a Per-Post basis.
Activating this feature will also enable a function that looks for a "post-formats" folder inside your /wp-content/themes/[CHILD THEME NAME]/images/ directory and if it finds this folder it will use any appropriately named icons inside it and display them to the right of your Post Title.
By "appropriately named" we mean PNG images given the name of the Post Format (eg. gallery.png, chat.png, etc...)
Learn more here: WordPress Codex | Post Formats