Remove unnecessary words — Every word existing on your page must be necessary. If you can remove a word without it reducing how enticing, clear, or useful a sentence is, remove it. (Excess verbiage increases the visitor's labor, which triggers their impulse to skim.) A tip: avoid clichés like revolutionary, incredibly powerful, best-ever, and so on. Other products claim these qualities, so visitors are blind to them. It's better to specifically describe how you're different.
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.