First find the domain name that reflect your product and preferable also other aspects of your business. We are domain consultant and can help you with our expert-advice.
Second step is a website to establish your online identity. You website will become an extension of your business and your showcase to the world. Having a designer with artistic capabilities will give the advantage over 70% of all websites online that just lack that personal touch. They are the product of a template everyone can buy.
The last but not the least step is search engine optimization. It means using the right description of your business in the website and adding: Meta Tags, robots.txt, a site map and keywords besides creating a flawless and accessible website.