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What is an 'Advance Payment'. An advance payment is a type of payment that is made ahead of its normal schedule, such as paying for a good or service before you actually receive the good or service.
Push, or server push, describes a style of Internet-based communication where the request for a given transaction is initiated by the publisher or central server. It is contrasted with pull/get, where the request for the transmission of information is initiated by the receiver or client. Push services are often based on information preferences expressed in advance. This is called a publish/subscribe model. A client subscribes to various information channels provided by a server; whenever new content is available on one of those channels, the server pushes that information out to the client.