With the boom of social media sites, advertisers have been given another great way to tap into already existing markets and build on current conversations. With more than 300 million active users on Facebook, small businesses can easily tap into these communities to spread their message with minimal effort. By simply building a page for your company and connecting with friends to develop a community, you can start to trigger customer conversations.

Also Facebook in particular can be great in advertising and marketing for job opportunities. Other social media tools like Twitter and the blogosphere at large are great ways for marketers to find customers who are talking about your company or people interested in your space.

These tools are free—and best of all, they do wonders for bringing you closer to your customer and helping you engage with them.