A virtual tour can mention several things. Technically, anything that is online that in some way shows your site visitant your true location is a virtual tour. There are, of course, many ways to cater a virtual tour.
The first and most easy is a series of images. They can have captions defining every picture, or not. It is really preferred images for most of the customers even if they are also going along one of the more high tech solutions. This creates your website more accessible for those still using dial-up for their Internet connection.
The second, and one I do not recommend, is using a video of your location. While this can show your location to potential clients, it's analogous to using a black and white flyer with clip art when you have the capability of producing a professional full-color ad. Unless you have pros producing it, it ends up looking very amateur and brings down the professionalism of your site.
The third is using what is generally referred to as a 360 virtual tour. Now this can cause a few confusions, as the two methods I previously mentioned can be referred to as a virtual tour.
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