A few days ago, I answered the door to a chap from a well-known company asking if I would be interested in a quote for new windows. They had just completed an installation locally, and were taking advantage of this to canvas door-to-door. As it happens, we will be looking to replace a couple of windows in the next 12 months. And because he knocked on my door, I will almost certainly consider his company. So why am I, a social media marketing consultant, telling you about this