Whether the clients you are looking for are social media experts, or people who only have a Twitter or Facebook account, everyone is using social media. By becoming an expert yourself, you will be able to reach out to your specific target audience. By default, you will also ultimately hit some people who are not part of that audience. This is not necessarily a bad thing, as increasing your exposure can help you in unimaginable ways. Perhaps Bob the engineer has a friend in need of a translator and just so happened to see a link to that video you posted on YouTube. Social media can encompass everyone, everywhere, and in an instant. Whether for personal or professional purposes, everybody today is using social media, so take advantage of it.