The present invention provides a method of providing an online for offline (O4O) platform service by being connected to a code provided by a specific O4O usage space provider and arranged on at least a portion of a specific O4O usage space. The method of providing an O4O platform service comprises: (a) a step in which a server provides a user terminal with specific first content corresponding to a recognized code or supports the specific first content to be provided when the code arranged on at least a portion of the specific O4O usage space is recognized by the user terminal; and (b) a step in which the server provides the user terminal with specific second content in response to completion of reading a predetermined portion of the specific first content of the user or greater, or supports the specific second content to be provided when it is determined that reading the predetermined portion of the specific first content or greater is completed.;COPYRIGHT KIPO 2020
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