WordPress SEO ByYoast

This is my all time favorite plugin and I am currently using it on my blog. This plugin has been created by Joost de Valk and has been downloaded over 7.5 Million times with an average rating of 4.1 out of 5. This clearly shows that it is one of the best Plugin(For Both On-Page & Off-Page SEO) in the market for WordPress. The Best part about this plugin is that it is completely free.

Features: You can set Post Title,Meta Descriptions,Permalinks,Breadcrumbs,Canonical Url,XML Sitemaps and much more on your blog. If you want to make your blog social media friendly then you can even add Facebook Open Graph and Twitter MetaData. If you are using All-In-One SEO or HeadSpace2 SEO Plugin on your blog then with the help of Import Function you can move your SEO data(Meta title and description) into this plugin.

In addition, it previews how your content will look in search engines, controls which pages from your site go to search engines, allows you to control indexing of categories and archives, and so much more.You can even edit your robots.txt and .htaccess file with WP Yoast. With the help of Flesch Reading Ease scale you can check whither your post is easy to read or not.

WordPress out of the box is already technically quite a good platform for SEO, this was true when Joost wrote his original WordPress SEO article in 2008 (and updated every few months) and it's still true today, but that doesn't mean you can't improve it further! This plugin is written from the ground up by Joost de Valk and his team at Yoast to improve your site's SEO on all needed aspects. While this Yoast SEO plugin goes the extra mile to take care of all the technical optimization, more on that below, it first and foremost helps you write better content. Yoast SEO forces you to choose a focus keyword when you're writing your articles, and then makes sure you use that focus keyword everywhere.

As compared to other  WordPress SEO plugins “WordPress SEO By Yoast” is little complicated but still I Would highly Recommended this to every WordPress blog owner.