Good design is a subjective term according to ChatGPT that can mean different things to different people, but there are some generally accepted principles that can help define what makes a design good. Here are some key elements of good design:

1. Functionality: Good design should fulfill its intended purpose effectively and efficiently. It should be easy to use, and the user should be able to achieve their goals with minimum effort.
2. Usability: A good design should be user-centered and easy to navigate. The user should be able to find what they need quickly and easily, and the design should be intuitive and straightforward.
3. Aesthetics: A good design should be visually pleasing and aesthetically pleasing. It should be visually appealing, engaging, and memorable.
4. Simplicity: Good design should be simple and straightforward. It should avoid unnecessary complexity and clutter, and focus on the essential elements of the design.
5. Consistency: A good design should be consistent throughout, from the layout and typography to the color scheme and imagery. Consistency helps to create a cohesive and unified design that is easy to understand and use.
6. Innovation: Good design should be innovative and creative. It should push boundaries and challenge conventions, while still fulfilling its intended purpose.

Ultimately, good design is a balance of form and function, aesthetics and usability, and innovation and simplicity. It should effectively communicate its intended message and fulfill its purpose, while also engaging and delighting the user.