Demonstrating and educating means giving your customer all the information they need to understand what you're selling and all the details they personally need to know about it. You may need to educate your prospects first about your topic first. They may not know they need it. So you make your site a go to place to get information on the topic. Demonstrate as well as educate by doing videos that show how your product or service works or how it is in use. You can also produce videos that show how it works in different situations. Good Selling is all about demonstrating and educating.