The one piece of information about your website that matters most is: how do your users interact with it? It’s easy to find out what they think about it: you can just ask them. But it’s very hard to find out how real users go about navigating your website.
If you want an effective social media presence, you’re going to want images that fit with News Feeds, timelines and streams. Trouble is, the different channels all use different sizes and shapes for their images, and to keep you on your toes, they occasionally change them too.