So there you go, your first step into the world of JavaScript.
We've begun with just theory, to start getting you used to why you'd use JavaScript and what kind of things you can do with it.
Along the way, you saw a few code examples and learned how JavaScript fits in with the rest of the code on your website, amongst other things....paragraphs, headings, and data tables, or embedding images and videos...client, e.g. creating a new HTML table, filling it with data requested...