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I’m a big proponent of making your community efforts as broad as possible, including the creation of groups on Facebook, LinkedIn, and other sites. However, if (like most companies that use Lithium) you already have a company website and people using that website today, there are a number of advantages to making your website the home to your community:

It’s what customers expect. Customers looking for your community are more likely to come to your site than they are to come to Facebook.