1.What's Render-Blocking Scripts? And How To Solve This?? 2.How To Set an expiry date or a maximum age in the HTTP header?

Question

Google PageSpeed Insights Show Poor Qualities. They Marked Some Script as render blocking and ask for Leverage Browser Caching

Codes

ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js

http://netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.min.css

https://www.blogger.com/static/v1/widgets/1171200566-widget_css_mobile_2_bundle.css

https://rawgit.com/SohanRazzak/Blogger-Ajax/master/css_mobile_2_bundle.css

https://rawgit.com/SohanRazzak/Blogger-Ajax/master/font-awesome.min.css

Answer 1

For the leveraging browser caching and adding expires headers you can use the .htaccess file.

This link is to the boilerplate template for a .htaccess file.
https://github.com/h5bp/html5-boilerplate/blob/master/dist/.htaccess?ts=2

For the Render Blocking
Before the browser can render a page it has to build the DOM tree by parsing the HTML markup. During this process, whenever the parser encounters a script it has to stop and execute it before it can continue parsing the HTML. In the case of an external script the parser is also forced to wait for the resource to download, which may incur one or more network roundtrips and delay the time to first render of the page. See Adding Interactivity with JavaScript to learn more about how JavaScript affects the critical rendering path.

Here’s a guide to an in-depth understanding.

https://developers.google.com/speed/docs/insights/BlockingJS