Most SCSS cheatsheets are a syntax dump. This one is laid out the way you actually learn the language, nine topics side by side, each with the handful of lines that matter and a plain explanation of what every one of them does. It is wide rather than long, so the whole language fits in a single view: what to write, what it compiles to, and where the common traps are. Keep it open while you build, or save the image and pin it nearby.
Each section has a full article behind it if you want the reasoning: variables, partials, imports, mixins, inheritance, operators, functions and media queries.
Hope this helps.
