WordPress 4.1 update provides new extended version of plugin installer that shows you recommendations for installing new plugins.
All recommendations are based on the plugin you have already installed in your WordPress site.
First make sure you have updated your WordPress installation to new WordPress 4.1 version.
Then, visit your admin area dashboard Plugins -> Add New page and you will be noticing the plugin installer has a new ‘Recommendations’ tab.
Click that tab and it will show you plugin recommendations that are entirely based on the plugins you and other users have installed and using.