It is a code - editor which is highly popular. VS Code, can be used to write code in any programming languages by downloading the respective packages of the language. But here we will be focusing on Webb - Dev only. For for Static Web pages or HTML , CSS & JS web pages nothing needs to be downloaded. Only VS Code is needed.
It is Made by the Company Microsoft. We won't Recommend to install it from third party sites. Download it from here.
Wikipedia says : "Visual Studio Code is a code editor made by Microsoft for Windows, Linux and macOS. Features include support for debugging, syntax highlighting, intelligent code completion, snippets, code refactoring, and embedded Git."