When talking about SEO, and more specifically WordPress SEO, it’s a must to mention the WordPress SEO Plugin by Yoast. This amazing and absolutely Free plugin has all what you need to optimize your WordPress site for search.
WordPress Themes may have SEO features, but not all of them, actually many WordPress developers believe that SEO has to be done via a plugin, and it shouldn’t be part of the Theme functionality. In fact, if you are using a respectful WordPress theme or framework that has its own SEO functionality, you will probably be able to switch to use WordPress SEO plugin with no issues, once you install the plugin, your theme will realize that, and automatically switch off its SEO functionality.
Yoast has long time experience with SEO and WordPress, he earned the name and made the top SEO plugin, so basically you are in a good hands. The plugin gets regular update to keep your site up with the recent SEO changes, especially with Google.
Here is a list of features included in the plugin:
By far, the best and the only WordPress SEO plugin that you can trust and rely on to customize your blog for search engines.