Social media is one way to promote your blog or website online. Interaction with people interested in what you are selling or promoting can easily be found in social media circles such as Twitter.
An important part of networking in social media is finding the right circles to travel in. Not everyone on Twitter or other media groups are going to need or want what you are offering. Research your market nitch to determine what types of people may need your services or products.
Once you have determined the type of people or groups to target search for them within the network of choice. Follow them and communicate with them. Offer them useful information for free before trying to make money from them. Build trust in potential customers or clients first and then follow through on what you promise you can supply.