UX (User Experience) is about the overall feeling a user has when they interact with a product—is it easy, logical, and enjoyable? It's the underlying structure and flow. UI (User Interface) is the visual part—the look and feel of the buttons, typography, and layout. A great product needs both: a solid UX foundation and a beautiful UI on top.

1. Good UX design is critical because it directly impacts customer satisfaction and loyalty. An easy-to-use and enjoyable product will lead to higher conversion rates, better customer retention, and a stronger brand reputation. A bad UX will drive customers away, often to your competitors.

1. A wireframe is like a blueprint for a website or app screen. It's a simplified visual guide that shows the structure and layout of a page, including where key elements like buttons, images, and text will go. It focuses on functionality and information hierarchy, not on visual design like colors or fonts.

While visual appeal is important, a design that looks good but is hard to use is ultimately a failure. User research is necessary because it helps us understand the specific needs, goals, and frustrations of your target audience. Designing based on this real user data—instead of assumptions—is the key to creating a product that is truly successful.

A design system is a comprehensive library of reusable UI components (like buttons, forms, and icons) and a set of clear guidelines for how to use them. It ensures that as your product grows and evolves, the user interface remains consistent, which improves usability and speeds up the design and development process.