I dont have hope in submitting links on search engine. If your site is good enough with basic back links, then it will be indexed by SE automatically.
Search Engine bots often crawls in these directories to fetch latest updates. So promoting your site in those sites would quickly get crawled and indexed.
Directory Submission increases the backlinks of your website, as we know, google like websites with a lot of backlinks. So, I think Directory Submission is useful for SEO.
Directory submission of your websites helps search engines, ... Directory submission is also an essential step for SEO as it generates ...
While Google certainly feels that many directories are valuable, those that are built with SEO purposes in mind are generally viewed as somewhat manipulative and we make an effort to see that their value is limited. Google doesn't treat SEO directory sites any differently than any other sites – if their PageRank is high and their content is relevant, we pass just as much link value and anchor text weight as any other similar link.