Tech Stack Terms for Vibe Coding

AI gave me a command to run, but I don't know what it will do. Is it safe to run?

AI told me to install dependencies, and one command downloaded a ton of stuff. What's going on?

When someone asks what tech stack I use, what am I supposed to say?

What language makes the interactive parts of a webpage move and respond?

I've heard there's a stricter version of JavaScript that catches mistakes early. What is it?

What's the language everyone recommends for automating spreadsheets and files with a script?

People keep saying to use React for websites. What's better about it than writing the page directly?

Is Vue really friendlier for beginners, and how is it different from React?

Is there a framework for building a full React site with routing and SEO?

Do I really have to open a separate CSS file for every style change? Can I adjust styles right where I write the markup?

Is there a set of good-looking components I can copy into my project and customize?