1. 1. Understanding User Experience (UX) Design: Web designers should have a good grasp of UX design principles, which include creating clear and concise navigation, responsive layouts, and a visually appealing design that enhances the user's experience.

2. Responsive Web Design: Websites should be responsive, meaning they adjust to different screen sizes and devices. This ensures that the website is accessible to all users, regardless of the device they are using.

3. HTML and CSS: A solid understanding of HTML and CSS is essential for web designers. HTML is used to create the content of a website, while CSS is used to style it.

4. Accessibility: Web designers should design websites that are accessible to people with disabilities, including the visually impaired. This means creating websites that are screen-reader friendly, use appropriate color contrasts, and have clear labels and headings.

5. Search Engine Optimization (SEO): A basic understanding of SEO can help web designers create websites that are optimized for search engines. This includes using relevant keywords, meta tags, and creating content that is optimized for search engines.

6. Web Analytics: Web designers should understand web analytics tools, such as Google Analytics, to measure the success of their website and identify areas for improvement.

7. Visual Design Principles: Web designers should have a solid understanding of visual design principles, such as color theory, typography, and layout, to create visually appealing and cohesive designs.

8. Collaboration and Communication: Web designers should be effective communicators and able to work collaboratively with other team members, including developers, content creators, and clients, to create successful websites.

By understanding these key principles, web designers can create effective and engaging websites that meet the needs of their users and clients.