Hello
What is the difference between SimpleCss and Additional Css?
And in the case of SimpleCss where are the changes made?
And which of the two is better to use?
they work in the same way – both of them write inline CSS styles into the head of your site.
The advantage of Simple CSS is:
1. It has a Code Mirror editor in the dashboard, which is a nicer interface then the one provided in the Customizer.
2. It provides a Simple CSS meta box in the post editor, allowing you to add CSS that is specific to just that post.