page speed hlp

While scaning my blogspot site with google PageSpeed Insights,the speed speed of my site was poor.It suggested to apply the recommendations.but i could not understant how?
so plz help me how to optimize the below issus.

1)
Remove render-blocking JavaScript:

ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js

blogger.com/static/v1/widgets/3392677022-widgets.js

2)
Use asynchronous versions of the following.scripts:

apis.google.com/js/plusone.js

3)
Optimize CSS Delivery of…

page speed hlp