22.1. Understanding Profiles
One of the most significant differences between profiles and other types of state management is that profiles are designed to store information permanently, using a back-end data source such as a database. Most other types of state management are designed to maintain information for a series of requests occurring in a relatively short space of time (such as session state) or in the current browser session (such as view state and nonpersistent cookies) or to transfer information from one page to another (such as the query string and cross-page posting).
If you need to store information for the longer term in a database, profiles simply provide a convenient model that manages the retrieval and persistence of this information ...
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