Key features of a successful business website include: - Responsive Design: Ensures the website is accessible on various devices, including smartphones and tablets. - User-Friendly Navigation: Simplifies the process for visitors to find information quickly. - Contact Information: Provides easy access to contact details, including phone numbers, email addresses, and physical locations. - Clear Call-to-Actions (CTAs): Encourages visitors to take desired actions, such as signing up for a newsletter or making a purchase. - Security Features: Protects user data and builds trust, especially for e-commerce websites.