hatul

The plugin enable to add CSS in option page. The CSS of the plugin overide CSS of theme,it’s enable to edit style without to edit the file of the theme.

Custom CSS CC

Satya Prakash

Did you ever read about Optimization of website/blog through ordering styles and Scripts in head section? 
If you like your website load in browser as quickly as possible then you may have read in performance optimization tips that 
you should move all CSS files on top and script at last in HTML head section <head></head>.
How do you order those calls? If you are manually putting CSS and JavaScript files in head section (<head></head>), 
then you can do this very easily. Just modify once and optimization for this is over. 
What if you are using plugins and that are adding calls to JavaScript and CSS files dynamically. This is case of WordPress blog, 
where we use many plugins and those plugins add various Styles and Script files dynamically from wp_head() call.
If above lines, do not makes much sense to you then probably you have not 
read this documentation on <a href="http://code.google.com/speed/page-speed/docs/rtt.html#PutStylesBeforeScripts" rel="nofollow ugc">Google</a>.
The plugin will also collect different inline scripts to one place. Thus making the source code 
look better.
To check, if the plugin is doing anything or not, compare the Head section before and after 
activating the plugin.
(For reading more details discussion, follow the Plugin link on right side.)
<a href="https://profiles.wordpress.org/satya61229" rel="nofollow ugc">Author (satya61229) About page on WP</a>

Performance Optimization: Order Styles and Javascript

Ordering StyleSheet and JavaScript (external and inline) for performance optimization.

Custom CSS CC vs Performance Optimization: Order Styles and Javascript