A pitch deck is usually a 10-20 slide presentation designed to give a short summary of your company, your business plan and your startup vision. It also serves very different purposes, from trying to get a meeting with a new investor, to presenting in front of a stage, and each one of them should follow a different structure. A demo day presentation, for example, should be very visual and contain very little text. It’s going to be seen from afar and you’re going to do all the talking. On the other hand, a pitch presentation that you’re planning to email should be completely self-explanatory. It’s going to be seen on a laptop monitor, so small font is not so bad.