Talking about powerful plugins, the Jetpack plugin is a must-have for any blog/website powered by WordPress. It’s a plug-in that really packs a punch. It’s in-built for sites hosted on WordPress.com, but if yours is self-hosted, then you should sharpaly install this plugin.
The Jetpack plug-in is more like a 36-in-1 plugin. It gives you a lot of features, which include but not limited to
Photon – This would allow you to make use of WordPress’ Content Delivery Network (CDN).
WordPress.com Stats – Shows you stats about visits, page views, most viewed pages, referrers and more.
Sharing – It adds a sharing toolbar to your posts from which visitors of your site can share your content to social networks like Facebook, Twitter, Google+, Pinterest, LinkedIn and more. You can also select, which ones should be available and which ones should be hidden.