Most RSS Aggregators give you the ability to add a cron job to trigger the updates. While this is one way to accomplish this, you are still limited to triggering this once every X minutes or using some other set of conditions. There is no way to have an item that is posted on a feed on an external site (such as news.google.com) to update on your site the moment it is posted to Google (in this case)
Some RSS Aggregators have a “poor man’s cronjob” by updating itself the next time someone logs into your system after X minutes has elapsed. Without knowing more specifics, all I can provide is general information.
Good luck with your project.
Thanks for your reply. The cron job is working fine. The problem is getting my page to refresh automatically.
To get your problem solved here are few plugin links i would like to share with you
http://www.wpematico.com/
http://feedwordpress.radgeek.com/
https://premium.wpmudev.org/project/autoblog/
hope one of these will help you to solve your problem.
