Press Release Submission is also part of Off page SEO. But this not common in SEO experts but this is also play main role to promote you website and press Release is also give you high page rank back links and these back links also helpful for you to maintain your site on top of Search Engines. Submit you site on all links which provide in Press Release Submission List.
Press Release Submission List also published on SEO render. Press Release Submission is also main part of Black hat SEO or Off page SEO. SEO render providing for their User more then 100 Press Release website. Press Release Submission will also play main role to promote your website and it will also increase your website traffic in few weeks. Submit your website in all Press Release website for make strong off page SEO of your website.