Add Custom CSS and JS to Your Website
You can add your custom CSS codes (snippets) easily via the Customizer.
In order to do this, go to Apparance > Customize > Custom CSS/JS and enter your code into the text area.
You can also add your custom JS directly from the Customizer.
In order to do this, go to Appearance > Customizer > Custom CSS/JS and enter your code into the Custom JS text area.
Please not that is not possible to add Google Analytics codes in this area, because they have changed their methods. If you wish to use Google Analytics on your website, please install a plugin which supports GA.