If you use a search box on your WordPress blog, this plugin will be able to record everything people search for. This will allow you to analyze & improve the content on your website.
What better way to evaluate users’ satisfaction than by providing a straightforward, and comprehensive rating system? Easiest way to do that is with Yasr – Yet Another Starts Rating.
Page Views Count is a simple plugin that requires no coding, and allows site visitors and site owners to rapidly and effortlessly see how many people have visited a page or post.
Quickly add the verification code of Google Search Console (previously known as Google Webmaster Tools) to your WordPress site and display Clicks, Posistions, CTR and Impressions from the most popular search engine.
Keep the track of your words and improve your website's content using the WordPress Word Count plugin. Check stats, make sure there's no slack and gamify the entire process.
The only plugin I'd recommend for connecting your MailChimp account to WordPress
Track the analytics of your RSS feed, and integrate with WordPress so you can redirect and customize your feeds automatically.