Depending on what you’re selling and who you’re marketing to, you might answer that question in a number of different ways. For example, if bug-free software is a big deal to your potential customers, you may want to focus on how fine-tuned your software is. You might want to include a section about your support team, how many users you have, how you handle errors…you get the idea.
Prospecting and marketing are all the things you do to get people into the first of your sales funnel stages. Note that stages are broken into two or more steps wherever possible. A demo could be called a single stage, but in real life it involves a lot of things: contacting the customer, sending reminders, doing the demo, and then following up. Whatever your own sales stages look like, the support you need in managing them will be the same.