A Web Developer is a professional who is responsible for the design and construction of websites. They ensure that sites meet user expectations by ensuring they look good, run smoothly and offer easy access points with no loading issues between pages or error messages. A web developer makes and maintains websites. They are in charge of a site's overall look and feel. Web developers also handle the technical aspects of a website, including its performance (website speed) and capacity (the maximum amount of traffic the site could handle at a given time). Web developers create and maintain websites. They are also responsible for the site's technical aspects, such as its performance and capacity, which are measures of a website's speed and how much traffic the site can handle. In addition, web developers may create content for the site.