What is a 360-degree view in CRM?

The importance of a 360-degree view of the customer cannot be overstated. It improves the effectiveness of all your marketing efforts, predicts the potential demand, helps salespeople to up-sell and cross sell more. The 360-degree view also enables companies to provide the best customer experience, increase customer loyalty and satisfaction.
To aggregate enough data to have complete information about the customer, companies use social media listening (data coming from Facebook, Twitter, etc.), track all the touch points between the company and customers (e.g. calls, emails, sales and support tickets) and use predictive analytics (application of past and current data to forecast future behavior of customers).