The Standard publishing styles in Citation correspond to styleguides such as APA or MLA and Instructions to Authors, defining the sequence in which bibliographic information is placed in a citation, what print attributes will be used, how names will be presented, and similar points of citation style.
More on searching text, browsing records containing terms, and selecting subsets of records matching search criteria in Citation.
Any of the above Searches can be done as a Select - which means you actually create a subset of your database containing only those records that match the criteria.
Sorting is useful, however, for simply organizing your records to be viewed in a certain manner. For instance, you could sort all the cases in your datafile chronologically (this would be a sort on the Year field), or by the primary keyword (this would be a sort on the Keyword field; records or citations would be sorted by the first term in the keyword field.