Some sites use these as entry pages to their site. Often they use a flash animation.
An initial page used online to capture the user's attention for a short time as a lead-in to the product's home page. The splash page may tell the user what kind of browser and other software they need to go further, or frequently, offers a language choice if required. 58
An "intro" page that's basically all graphics or flash that exists before a site's content, usually intended to impress the visitor but with adult sites it's more likely to just piss off the surfers.