Learn how to create a responsive custom modal popup box using Bootstrap 5 in this Hindi tutorial. Explore the process of setting up a project, integrating Bootstrap 5 CDN links, and implementing both default and custom modal popup boxes. Discover techniques for customizing modal body content, incorporating Bootstrap icons, and applying CSS styles for enhanced visual appeal. Master responsive design principles to ensure your modal works seamlessly across devices. By the end of this comprehensive guide, gain the skills to create professional-looking modal popup boxes for your web projects.