What is the purpose of using script tags in digital documents?

Using script tags in digital documents primarily serves the purpose of adding interactivity to web pages. Script tags, such as those used for JavaScript, enable developers to implement dynamic features and functionalities that can respond to user actions. This includes tasks like validating form inputs, creating interactive animations, handling events like clicks and mouse movements, and manipulating the Document Object Model (DOM) to update content without needing a page refresh.

This capability enhances user engagement and creates a more immersive experience. Interactivity plays a crucial role in modern web applications as it allows for features such as dropdown menus, modal windows, and live content updates, which are all vital for providing a responsive user interface.

The other options focus on different aspects of web design and functionality. Although enhancing aesthetic appeal and formatting text can be achieved with CSS, they are not directly related to the purpose of script tags. Similarly, while SEO strategies can enhance a website's visibility, they typically do not rely on script tags to achieve that goal.