WordPress 4.3 Version, named “Billie” in honor of jazz singer Billie Holiday, is available for download or update in your WordPress dashboard. New features in 4.3 make it even easier to format your content and customize your site.
Menus in the Customizer is someting new you may like.
Better Passwords is another change will help stop hacker. While adding new user it will generate strong password automatically.
If you like to know more about the update you may like to visit the site.