Well, Web Design is the process of building the frontend of the website. In other words, the look of your website. Whereas web development is making it working and dynamic so that shows you results according to your query.Development for a website serves the purpose of users to see dynamic results, like moviebooking websites, e-commerce websites, etc...which involves some transactions. By transactions , means you enter a query for something and in return you get an answer. Consider moviebooking website. If the want to book a show for tomorrow, you will check if there are tickets available or not. Website shows if there are available. If yes, you book them. This all functionality is done by some programming using server side scripting language and a database like MySQL. Whereas Web designing involves only designing a website by using softwares like photoshop and HTML langauge. Such websites are informative. They are not user interactive generally. Hope that helps!