Web 2.0 describes websites that use more advanced technology than early static websites, allowing users to interact with and share information on the web. Pop-ups originated as small advertising windows that opened automatically on web pages in the 1990s as a way to advertise products online, and major browsers began allowing pop-up blocking in the early 2000s. The first sponsorship video aired in 1946 as commercial television licenses were granted, and long-running UK soap opera Coronation Street has had notable sponsors such as Cadbury's and Harvey's over the years.