What is Directory Submission?

Directory submission is an off-page SEO technique that helps improve the SEO of your site. It allows you to submit your site to a specific category of a web directory, e.g., if your website talks about heath, you are supposed to submit your site in the health category of a web directory.
You are required to follow the guidelines of a web directory before submitting your site. Some of the popular directory submission sites are www.dmoz.org and www.seofriendly.com and www.directorylisting.com.