WordPress has a built in RSS feed - http://domain.com/rss
You are probably best off using some RSS Reader script on the external site to pull that in.
The other option is that you can do an iframe on the external site - the issue with this is you can run into theme issues with how it looks like a site within the site vs just showing the content
Hope that helps.
Hi @ArunPrakash ,
If you are going to be using external content on your site you may want to look at some tools like POWr.io https://www.powr.io/tutorials/how-to-add-rss-feed-plugin-to-your-html-site and these posted on Envato. https://codecanyon.net/search/rss%20autopilot
Hope this helps,