A sitelet is a small section of a Web site that has a special purpose and identity. In some cases, users are encouraged to link to a sitelet directly (rather than to come through the main Web site). A related term is minisite.
In Web advertising campaigns, a sitelet can be created for the duration of a campaign as the page that is linked to from a banner ad. The sitelet page can develop the campaign message more fully and immediately than if the user were linked to the main corporate or product site.
The term is also sometimes used for the temporary Web sites that are created for conventions, award presentations, or other events.