The main benefit of the HeatWave Cluster is its ability to provide real-time analytics on large datasets by processing queries in-memory, leading to faster query performance for analytical workloads.

MySQL Enterprise Authentication supports multi-factor authentication (MFA), which enhances security by requiring multiple forms of verification before granting access to the database.

MySQL Enterprise Audit is capable of logging failed login attempts and SQL queries performed by users, providing a detailed audit trail of database activity for security and compliance purposes.

The @'%' in MySQL user creation allows a user to connect from any host. This is often used when users need to connect from multiple different servers.

The FULLTEXT index is used for text searching in MySQL. It allows efficient searches on large text columns, such as those using the TEXT or VARCHAR datatypes.