The course teaches MySQLi, a way to connect to databases within PHP. It covers connecting to the database, and using all the features required to build fast, scalable applications that use a database connection. It covers essential concepts like security, and best practices with using the data retrieved from the database. Benefits of MySQLi An object-oriented interfaceSupport for prepared statementsSupport for multiple statementsSupport for transactionsEnhanced debugging supportEmbedded server support A knowledge of PHP and MySQL is recommended for this course. The course teaches MySQLi, a way to connect to databases within PHP. It covers connecting to the database, and using all the features required to build fast, scalable applications that use a database connection. It covers essential concepts like security, and best practices with using the data retrieved from the database. The course teaches MySQLi, a way to connect to databases within PHP. It covers connecting to the database, and using all the features required to build fast, scalable applications that use a database connection. It covers essential concepts like security, and best practices with using the data retrieved from the database. The course teaches MySQLi, a way to connect to databases within PHP. It covers connecting to the database, and using all the features required to build fast, scalable applications that use a database connection. It covers essential concepts like security, and best practices with using the data retrieved from the database.