What is the importance of schema in sql server?

Question

What is the importance of schema in sql server?

Where this schema help me? Is it important for security reasons?

Answer 1

What a schema is changed with the release of SQL Server 2005 and later - I think of it as an additional security layer as well as a container of objects.

This is quite a good resource: http://msdn.microsoft.com/en-us/library/ms190387(SQL.90).aspx