What are 'scripting languages' used for in web development?

Scripting languages are primarily used in web development to create dynamic content and manage interactions on web pages. Unlike static content, which remains the same for every user, dynamic content can change based on user interactions or other variables. For example, scripting languages like JavaScript allow developers to manipulate the Document Object Model (DOM), updating elements on the page without requiring a full page reload. This capability enhances user experience by making web applications more interactive and responsive.

Other options indicate functions that are not the primary role of scripting languages. Designing website layouts typically involves markup languages like HTML and CSS rather than scripting languages alone. Creating static webpages focuses on content that doesn't change dynamically, which is the contrary of what scripting languages provide. Hosting web content online is related to server management and infrastructure rather than scripting; it involves technologies that enable the storage and retrieval of web applications. Thus, the function of scripting languages clearly aligns with the creation of dynamic content and user interactions on the web.