There are many ways to promote your website and get more visitors. Here are a few of the most effective ways...
Every website I design is Search Engine Optimised. This means it's been designed so search engines can find it, read it and understand it. If the search engines can understand it better then they can list it in their search results better so the right people can find you.
Very few website developers design websites to be Search Engine Optimised. They usually just design a simple website which looks nice then introduce you to an expensive SEO company to sort out their mess. I don't do that, I make it work from day one.
Social Networking is a great way to promote your website...
I can create you a Facebook Page so people can find your business on Facebook and "Become a Fan". Your website can then automatically update your Facebook Fans on what's happening, special offers or whatever you want. Twitter is another popular way to promote your website working similar to Facebook.
Twitter and Facebook are very different but they can both be used to promote your website.
If your website is designed to collect the email addreesses of your visitors you can send them Emails telling them about what exciting things your doing/selling on your website/business.
You can get your website visitors email addreesses by asking them to register to view parts of your website, selling them something and many other ways.