On-line tour

I have been reading a lot of web pages and some articles. An d I found out one of the on-line promotional techniques existing, the on-line tour. On-line tour though not commonly use is one technique which helps you to promote your product' highlights and benefits. Given the example in one of my readings, you may have a CRM product that you want to advertise. The better way to show how the product works is you'll provide an overview or a tour about that certain product. Like, what could be the a complex product as they can see may look simple and easy to use.

What other on-line techniques you know about?