Using Kirki theme developers can create rich experiences for the WordPress Customizer using best coding practices.
Included are more than 30 custom control types ranging from simple sliders to complex typography controls with Google-Fonts integration, automatic CSS generation,
postMessage scripts automatically generated, tooltips and a lot of extras that make developing themes a lot faster for developers and meaningful for users.
We advise you to familiarise yourself with the Customizer API before you start writing your theme using Kirki. An excellent handbook for the WordPress Customizer can be found on the developer.wordpress.org website.