SQL queries are commands used to communicate with a database. They allow users to retrieve, insert, update, or delete data stored in tables. For example, a simple query can ask the database to show all the records of customers from a specific city. This helps businesses analyze information and make informed decisions. When writing SQL queries, you use specific keywords like SELECT, INSERT, UPDATE, and DELETE. Each keyword serves a different purpose, making it easy to manage data. By mastering these commands, anyone can effectively interact with databases and harness the power of their data for various applications.