If you are looking for a free way to promote your business online, you can have a look at various social media websites, which link customers with common interests or traits.
The main goal is to attract more traffic for your website (potential customers) and to possibly turn that traffic into real clients. Remember that you are dealing with customers, so keep this in mind when creating your social media profiles.
So what are the best known social media networks?
If you participate actively on at least a few of these sites, you will increase your profile and get a bit of free publicity. However, always keep in mind who your customers are, and try to be everywhere where they go.