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Each policy varies depending on company size, industry, regulatory requirements, corporate culture, and level of engagement with customers and the public. Some companies might be more concerned with brand awareness whereas others are more concerned with sales activities. If you are a smaller company, you might not be able to field a cross-functional team from Legal, HR, Marketing, Sales, Customer Service, and IT to manage your social media security tactics: it might all fall on Marketing and IT or perhaps just Marketing. This would dictate a number of different policy requirements. But every company still needs a policy in place if it is to engage with the public in a manner that includes risk reduction tactics.