Domain Parking
Pointing an unused domain at a single page (usually ads, a marketplace listing, or a placeholder) so it generates revenue or signals availability while the owner decides what to do with it.
Domain parking points a registered but undeveloped domain at a generic landing page, typically a pay-per-click ad page run by a parking service (Sedo, Bodis, ParkingCrew, Dan), a "for sale" listing, or the registrar's default placeholder. Parked domains generate small ad revenue from accidental type-in traffic and serve as a discovery surface for prospective buyers. Parking services concentrate huge portfolios behind a few common A records, which is why IP and nameserver intelligence can identify parked-domain clusters at scale. Most search engines treat heavily-parked content as thin and exclude it from indexing.