To bring the power of Mermaid.js into your web applications, you need to load the Mermaid library and set it up to render diagrams dynamically. Start by including Mermaid.js in your HTML, either from a CDN or by hosting it yourself. Once loaded, you can use JavaScript to initialize Mermaid and tell it where to find diagram definitions on your page. This setup lets you create diagrams on the fly, update them in response to user input, or even generate diagrams based on data from your app.

Dynamic diagram generation is valuable in web applications where content changes based on user actions or data. For instance, you might let users design their own diagrams, visualize complex workflows, or display real-time process flows that update as information changes. This flexibility makes Mermaid.js a strong choice for dashboards, documentation tools, interactive tutorials, and any application that benefits from up-to-date visualizations generated directly from code or user input.