Final answer:
The most commonly used type of database is the relational database.
Step-by-step explanation:
Relational databases organize data into tables with rows and columns, and establish relationships between the tables using keys. The most commonly used type of database is the relational database.
They are widely used because they provide a structured way to store and retrieve data, making them suitable for a variety of applications such as e-commerce, banking, and content management systems.