Social networks no doubts could be assets to getting yourself known as a web designer and to forge client relationships. The below social networks could be more targeted towards your needs.
Pinterest is a great place to get your work known and to build some network. You might target some clients by creating a board and “pinning” some of your work. Pinterest has over 70 million of active users which gives you ample chances of promoting your products.
Dribbble
If you are not already registered on Dribbble, you might consider giving it a try. This site is a community of designers on the web sharing their experiences and current projects in the form of screenshots and processes. You would get the opportunity to find out what others are working on and might find inspiration and build professional relations on the site.
Twitter is a powerful tool that requires no introduction. You could start by “following” your favourite blogger or designer and by engaging into discussions with other users. You could also share interesting content to gain a good following on the site.
Facebook is a great way to showcase your work and to target customers. Almost every businesses, creative companies and individuals have a page on the social network. With its gigantic user base of over 1 billion, your chances of engaging clients are pretty high.
LinkedIn would be your online resume or a teaser to your work and is great to show that you mean business. Connect with people sharing the same interests as you and you will gradually build a network of like-minded users that might convert into customers.