There are several reasons why large websites need VPS (Virtual Private Server) hosting:

1. Increased server resources: Large websites require a significant amount of server resources to handle high traffic and a large number of concurrent users. VPS hosting provides dedicated resources such as CPU, RAM, and disk space, ensuring that your website performs optimally even during peak traffic periods.

2. Better scalability: VPS hosting allows you to scale your website as your business grows. With VPS hosting, you can easily upgrade your server resources as your website traffic increases, providing a seamless experience for your users.

3. Improved security: Large websites are often targeted by hackers and malicious actors, making security a top priority. VPS hosting provides increased security features such as firewalls and SSL certificates to protect your website and user data.

4. Customization: VPS hosting provides you with more control over your server environment, allowing you to customize your hosting configuration to meet your specific needs.

5. Reliability: Large websites cannot afford to experience downtime, as it can result in lost revenue and a negative user experience. VPS hosting provides better uptime guarantees and reliability compared to shared hosting options.

Overall, VPS hosting provides a more robust hosting solution for large websites, offering increased performance, scalability, security, customization, and reliability.