As you can read in the Node.js documentation on the Buffer class, a buffer
is similar to an array of integers but corresponds to a raw memory allocation outside the V8 heap.
A Buffer is a chunk of memory, just like you would have it in C/C++. You can interpret this memory as an array of integer or floating point numbers of various lengths, or as a binary string. Unlike higher-level data structures like arrays, a buffer is not resizable.
It corresponds roughly to:
bytesor a non-resizable