Calling stored procedures spring DAO

I was reading folowing lines and I did not understand clearly.

Calling stored procedures
Sometimes we choose to execute our persistence operations as stored procedures
in the database rather than SQL in our application. This may be due to performance
reasons, company policy, or just a matter of taste.
Spring provides the same support for calling stored procedures as it does for executing
statements and queries. This time get the support by implementing
CallableStatementCallback.

what it means by
>> persistence operations as stored procedures
in the database rather than SQL in our application


are the stored procedures are not SQL.

Any ideas, resources,sample code,links, highly appreciated. thanks in advance.