What is the purpose of using Bootstrap in Liferay themes?

The purpose of using Bootstrap in Liferay themes is to enhance responsive design and layout. Bootstrap is a popular front-end framework that provides a collection of CSS and JavaScript tools designed to create responsive and mobile-first web applications. By integrating Bootstrap into Liferay themes, developers can utilize its grid system, responsive utilities, and pre-defined components to ensure that their themes adjust seamlessly across various screen sizes and devices. This capability significantly improves user experience by providing a consistent and visually appealing interface regardless of how the content is accessed.

Other choices focus on aspects unrelated to styling or front-end design. For instance, speeding up server-side processing, managing users and roles, and optimizing database queries are backend functionalities that Bootstrap does not address; instead, they pertain to the server environment, user management systems, and data retrieval methods, respectively.