How do you ensure a website is optimized for mobile devices and different screen sizes?

To ensure a website is optimized for mobile devices and different screen sizes, a web designer can follow these best practices:

1. Utilize responsive design: Implementing responsive design techniques allows the website layout to adapt and adjust according to the screen size of the device being used. This ensures that content remains easily readable and navigable across all devices.

2. Use viewport meta tag: Including a viewport meta tag in the website's HTML code helps to control the width and scaling of the webpage on various devices. This tag ensures that the content is displayed optimally on mobile devices.

3. Optimize images and media: Compress images and optimize media files to reduce loading times on mobile devices. This helps improve the overall performance and user experience of the website on smaller screens.

4. Test on multiple devices: Conduct thorough testing on different mobile devices and screen sizes to ensure that the website displays correctly and functions smoothly across various platforms. This can be done using device emulators, browser tools, and real devices.

5. Follow mobile-friendly design principles: Implement mobile-friendly design elements such as touch-friendly buttons, legible fonts, and simplified navigation menus to enhance the user experience on mobile devices.

By incorporating these strategies, a web designer can ensure that the website is optimized for mobile devices and provides a seamless viewing experience across all screen sizes.