Note on Visualizing Concurrency in Go · Divan's Blog via divan's blog

To be short,

Parallelism is simply running things in parallel.

Concurrency is a way to structure your program.

Thus, the concurrent program may or may not be parallel, these concepts are somehow orthogonal.

FROM:

divan's blog

Visualizing Concurrency in Go · Divan's Blog

Source

This source post is a fantastic example of the visual medium explaining difficult programming concepts (e.g. worker pools and sub-workers).