1. A method for providing a social networking service (SNS) by a computer server, comprising: receiving an original text and one or more comments regarding the original text; dividing the original text and the one or more comments into a plurality of threads according to a preset criterion; analyzing relationships between users who wrote the original text and/or the one or more comments included in the plurality of threads; categorizing the users according to a result of the analysis; and outputting a result of the categorization to storage for use in a subsequent request to determine a view of the plurality of threads of the original text and the one or more comments, wherein the analysis is performed based on length of at least some of the one or more comments, and wherein the dividing of the original text and the one or more comments into the plurality of threads comprises dividing a preset number of the original text and the one or more comments into the plurality of threads.