A complex website is a website that has a more intricate design and functionality than a simple or standard website. 

It typically includes advanced features and interactive elements that require more sophisticated coding and programming. 

Complex websites can be used for a variety of purposes, such as e-commerce, social networking, or web applications.

Who Needs a Complex Website?

1. E-commerce businesses: E-commerce websites often require complex features such as product pages, shopping carts, and payment processing systems.

2. Social networking platforms: Social networking websites require complex functionality such as user profiles, messaging systems, and news feeds.

3. Web applications: Web applications such as project management tools, customer relationship management (CRM) systems, or inventory management systems require complex features such as user roles, data management, and integration with third-party software.

4. Government agencies: Government websites often require complex features such as online forms, secure document sharing, and integration with government databases.

5. Educational institutions: Educational institutions may require complex features such as course registration systems, grade tracking, and online learning management systems.

6. Large corporations: Large corporations may require complex websites with advanced features such as employee portals, customer support systems, and global e-commerce platforms.