.NET Core
.NET Core is a cross-platform, open-source framework for building modern applications that can run on Windows, Linux, and macOS. It is a successor to the .NET Framework and is part of the broader .NET ecosystem.
A Web API (Application Programming Interface) is a set of rules and protocols for building and interacting with web-based software applications. It allows different software systems to communicate with each other over the web. Web APIs are used to enable interactions between different applications, services, and platforms, often using HTTP requests and responses.