Experience : 1 to 5 year
If you hope to become a web developer, you must understand HTML and CSS. HTML is the most used markup language across the web, and web developers use it to create web pages on the Internet. CSS, on the other hand, is used to style the website. It's responsible for the choice of fonts, colors and layout in a website's design. Whereas HTML lays the foundation for a webpage, CSS styles it.
Responsive design skills
If you work as a web developer, it's important to understand how responsive design works. Because many people view webpages both online and on their mobile devices, the websites you create need to adapt to the changing screen sizes. If your website isn't responsive, this means it won't be compatible with either the desktop site or the mobile site. In other words, it won't function or show up properly on either of these platforms. Your ability to create a responsive design can also impact the number of visitors a website gets since most people are deterred from a website when it's not displaying properly.