Directory submission refers to submitting your website on various business directories that best suit your services.
Directory submission in SEO gives various advantages to your website such as
Websites with good and relevant directory submissions tend to index faster on SERP
The websites get two links per successful directory submission which are contextual category link and unique directory listing link, which raise the value of the website.
Because of two links i.e contextual category link and unique directory listing link, the page ranking and value will increase
Business directories have a social media buttons which give a wider spread and reach for your website which increases Brand Awareness and traffic to the website. Here is a list of some popular Directory submission sites