JSP, or JavaServer Pages, is a technology used for creating dynamic web content. It allows developers to embed Java code directly into HTML pages, making it easier to generate web pages that can change based on user input or other factors. JSP is part of the Java EE platform and is often used in conjunction with Servlets to build robust web applications. When a user requests a JSP page, the server processes the Java code and generates HTML, which is then sent to the user's browser. This process enables the creation of interactive websites that can respond to user actions, such as submitting forms or retrieving data from a database.