Do you know what a CMS is?
It’s an important piece of software that means you can manage the content on your website without having to know a huge bunch of university degree stuff in your brain. There are several good options for free that I recommend to everyone and keep in mind that free doesn’t necessarily mean that it’s not the best option for you.
You will likely never have to double click and open a button on your desktop to run one of these software packages, because they run on the server where your website is hosted.
Hosting is an important concept, which I cover in this article.