The ServletContext is an object that contains meta-information about a web application. It is created by the web container at the time of deploying the project. There is only one ServletContext object per web application. The ServletContext object is contained within the ServletConfig object, which the web server provides the servlet when the servlet is initialized. The ServletContext object can be used to get configuration information from the web.xml file. The attributes stored in the ServletContext are available to all servlets in the application and between requests and sessions.

Some commonly used methods of the ServletContext interface include:

• getContextPath(): This method returns the context path of the web application.
• getServletContext(): This method returns the ServletContext object.
• setAttribute(): This method is used to store an attribute in the ServletContext.
• getAttribute(): This method is used to retrieve an attribute from the ServletContext.
• getContext(): This method returns the ServletContext object that corresponds to a specified URL on the server.

In summary, the ServletContext is an object that provides a way for servlets to communicate with the web container and share information across the web application.