Really boosts my SEO

I am working with WordPress since 2011, I studied about SEO since 2003.
At first I was using another SEO plugin in WordPress, it had some improvements. But most thing I did, was adding tags and I had no clear view about SEO.
I started using Yoast WordPress SEO since Sep-2014, it ‘s not important for me that what did this plugin for me,
But
I LEARNED FUNCTIONAL SEO SKILL by YOAST WORDPRESS SEO in its admin panel
and this makes my income.
Thank You WordPress SEO!