Every combination of a time period and a standardized service that has to be delivered in person is easy to book online.
Most successful are ambulatory services, acupuncture, hairdresser and beauty centers, financial services, automotive and personal healthcare. Personal coaching, trainers and consultancy are also favorites. Agreements with (lower) governments are also increasingly common (passport, driver’s license). Services that require a personal intake, such as psychologists, relationship therapists and accountancy services, are certainly also popular.
Actually, every professional who wants to make direct contact with the market without campaign money.