These operations form the backbone of any web-based system, enabling users to interact with and manage data seamlessly. In a Flask application, CRUD operations are typically performed on a database, and they are essential for building dynamic and interactive web applications.

The 'C' in CRUD stands for Create. This operation involves adding new data entries to a database, often via HTML forms or API requests. In a Flask application, you'll learn how to handle user input, validate and sanitize it, and then insert the data into a database using SQLAlchemy.

The 'R' in CRUD stands for Read. This operation is about retrieving data from the database and displaying it to the user. In Flask, you'll explore how to query the database to fetch information, render it on web pages, and make it accessible through API endpoints.

The 'U' in CRUD stands for Update. This operation allows users to modify existing data. In this Flask course, you'll learn how to create forms and endpoints that enable users to edit records in the database.

The 'D' in CRUD stands for Delete. This operation involves removing data from the database. In Flask, you'll demonstrate how to create routes and interfaces that allow users to delete records, ensuring data integrity and security.