Web development is the coding or programming that enables website functionality, per the owner’s requirements. It mainly deals with the non-design aspect of building websites, which includes coding and writing markup.
Web Development is some-what a vague term used to describe the building or maintaining of web sites hosted on the internet. I use the word ‘vague’ because there’s so many programming languages, frameworks and tools that are used for Web Development. Web Development could refer to a single web page built with HTML and CSS that might contain a couple hundred lines of code.