It is called marketing. You have to market your business. That means
understanding who you are trying to target and getting the right message (a
message they will respond to) in front of them.
Do a search about SEO - a good way to drive organic traffic to your online
store. Also, use all the free resources that you can like twitter, facebook,
linkedin, google +, youtude, etc. This will not only drive traffic to your
site but will improve your search rankings.