What Virtual hosting is
Virtual hosting is affordable for individual people's Web sites (vanity pages) and small businesses because this technology allows many sites to share the same server (there could be hundreds or thousands of them). The important thing is that no one else has access to your directories. However, unlike dedicated hosting, virtual hosting tends to have more traffic (from the co-located sites) and therefore less bandwidth per site and slower downloads.
The meaning of Web designer
The aesthetic and navigational architect of a Web site, the designer is the person responsible for how the site looks and feels. He or she is the one who takes the heat if the graphics are fuzzy, the links are too light, or something is hard to find on a Web page. Usually this person is trained in the creative side of image development; however, an extensive knowledge of Web-based programming and information architecture is considered fundamental to being a successful Web designer. (That and good client-relationship skills are a must.)