A microsite is a website made for a specific purpose, often by a company that already has a website. They can be a small part of the larger site or contained separately. For example, a soft drink company may launch a competition, and so create a microsite that deals only with that competition.
Microsites can be very effective ways of advertising, as they can look and feel radically different from a companies main website, and be much more focused.
Glossary Index