A web designer someone who uses graphics and graphic design software to create look & layout of a website and ensure that a website looks good to keep the visitors hooked. Web design deals with the visual aesthetics and usability of the website, right from colour scheme and the layout to how the customers interact with it, also referred to as user experience (UI).
Web development deals with the non design aspect of building websites, which includes coding and writing mark-up. It involves the tasks like web content development, client-side and server side scripting, network security configuration that enables the functionality of the website as per the owner’s requirements, etc. Web development has two parts: front end development and back end development.