Salesmen are good at what they do, and they will tell you that apps are the future or that you can simplify your website. While apps aren't the future, there's some truth to simplifying, but it's at a cost. What I would say is that you should simplify and then have a blog or archive, just in case. Facebook doesn't do this for you. Twitter or Instagram either. Youtube can be useful, but it's not really a great place for people to learn more about your business.