Can anyone recommend solid online classes to learn SEO, whether they are free or $ (my boss is paying)? And is there a must-have SEO certification, or any that carry more weight than the rest?
some alternative is Google Webmaster Blog here had a course name "Take Webmaster Academy" from google https://www.google.com/webmasters/learn/ another will be Google Digital Garage learndigital.withgoogle.com/digitalgarage, it is a certification program and it is FREE I am still working to complete it, at 3rd chapter now. Good luck to your study