it do helps in site site alot. Submitting your site to Google will include your site to Google Search.
You need to go here to submit your site to Google: http://www.google.com/webmasters/tools/
Log-in your google account and enter your site's address. You also need to include a sitemap on your website. It is an XML or HTML file that makes easy for Google spiders and crawlers to index your whole website.
If you don't know how to make a sitemap, here's a website that generates sitemaps for your sites: http://www.xml-sitemaps.com/
I hope I helped you out.