Finance is a broad term that describes activities associated with banking, leverage or debt, credit, capital markets, money, and investments. Finance also encompasses the oversight, creation, and study of money, banking, credit, investments, assets, and liabilities that make up financial systems.
Web development that are relevant to you will depend on your skills, experience, and interests. If you are new to web development, I recommend starting with front-end development or web design. Once you have a good understanding of front-end development and web design, you can then decide if you want to specialize in a particular area, such as web application development, mobile app development, or web performance optimization.