After deploying your website to Netlify naturally you run some performance tests using WebPageSpeedTest. You might notice and alarming red "F" or "E" in the top right of the screen.
A fork is your very own copy of some code which you can make changes locally without fear of breaking anything upstream (more on this later). You are free to add some feature and suggest that new feature be added back to the upstream repository.
Sass stands for Syntactically Awesome Stylesheets. It is a CSS Pre-Processor meaning you are able to write CSS with super powers of functions, variables, loops, mixins and components or partials.
If you are are software developer building websites you most likely are writing backend code, frontend code, configuring databases, servers and are using html, javascript, work with php, node js, .net, ruby, python insert favourite language you are coding.
git submodules are great, they allow you to add another repository to an existing project. So that you can keep your dependencies separate and managed by separate repos.'