Yoast SEO
This plugin is perhaps one of the most popular for search engine optimizing for WordPress. Here are the reasons:
- Has a well developed context sensitive help which is needed to be able to best utilize the SEO's range of functions and to achieve search engine rankings
- Scans your page then automatically adds SEO page title and provides suggestions based upon the content of the page
- The status indicator in real time, displays the quality of your key phrases, meta description and other component which you have set for that page which policies are set by Google