Dialog of structure

Here is that I image in the current structure of Shopify theme. In the templates folder has many kinds of folder. Each of them has individual meanings. The dialog overall is the key to me to understand the entire Shopify theme directory.

Why it is difficult

First time I tried to study Shopify, it was difficult to understand because I have no clue for the above entire image. The relationship of section and snippet.

This is how I remember

I found the image of above and start understanding how theme structure is built like. I am keeping this image in mind.