Building a mobile website involves creating a site that is optimized for viewing and interaction on mobile devices such as smartphones and tablets. The key focus is on responsive design, fast loading times, and a user-friendly interface. Here’s a step-by-step guide to building a mobile website:

1. Planning and Strategy
   1. Define the Purpose: Understand the primary goals of the website. Is it informational, e-commerce, a portfolio, etc.?
   2. Target Audience: Identify the target audience and their mobile usage patterns.
   3. Content Strategy: Plan the content structure – keep it concise and mobile-friendly.
2. Design
   1. Mobile-First Design: Start designing for mobile screens first and then scale up for larger screens.
   2. Responsive Layouts: Use fluid grid layouts that adapt to different screen sizes.
   3. Simplicity: Keep the design simple and uncluttered for easier navigation on smaller screens.
   4. Touch-Friendly Interfaces: Design large, easy-to-tap buttons and links.
   5. Optimized Media: Ensure images and videos are optimized for fast loading on mobile.
3. Development
   1. HTML/CSS/JavaScript: Use these technologies to build the structure, style, and interactive elements of the site.
   2. Frameworks and Libraries: Consider using front-end frameworks like Bootstrap or Foundation that are designed for responsive design.
   3. Testing on Devices: Regularly test the website on various mobile devices and browsers to ensure compatibility and responsiveness.
4. Performance Optimization
   1. Fast Loading: Optimize images, minify CSS and JavaScript, and leverage browser caching to improve loading times.
   2. Mobile SEO: Implement SEO best practices to ensure the site ranks well in mobile search results.
   3. Accessibility: Ensure the website is accessible to all users, including those with disabilities.