Submitting sites to a search directory is used to get backlinks to your site. It is one of the key methods to improve the SEO of a website. The more backlinks you get, the more likely the search engine will show it earlier when it doesn’t show up. Directory submission is mostly free.
You can also enter a site title that differs from the URL that contains your keywords. This way, you can create anchor text for your site. In addition, most of the search directories rank higher on the search engine results pages, so if you submit your site to such directories, your chances of getting a high page rank will be higher.