ASP.NET Core is a cross-platform, open-source web platform developed by Microsoft. It is used to build modern, scalable web applications that can run on Windows, Linux, or macOS.
Building web applications with ASP.NET Core

About creating web apps using ASP.NET
ASP.NET Core is a cross-platform, open-source web platform developed by Microsoft. It is used to build modern, scalable web applications that can run on Windows, Linux, or macOS.