ASP.NET is a Microsoft web application framework used to create dynamic websites, web applications, and web services. It is a part of the .NET framework, which allows developers to create web applications using languages such as C# and Visual Basic.NET.
Example:
A web page created using ASP.NET could contain a form with text boxes, check boxes, and buttons. When the user clicks on a button, a request is sent to the server, which then processes the data and returns a response. The response could be a web page containing the results of the request or a confirmation message.