What is Buffer?

In computer science, a buffer is a region of memory used to temporarily hold data while it is being moved from one place to another. In the context of Node.js, a Buffer is a class that provides a way to handle raw binary data. Buffers are used to represent a fixed-size chunk of memory outside the V8 JavaScript engine, making them suitable for handling streams of binary data such as TCP streams or file system operations. They are essential for dealing with binary data in Node.js, where you need to interact with file systems, networks, or any other sources that produce binary data.