This is my simple company homepage. When someone types www.mydomain.com, this page displays.
Although this experimental website is small and has just a few things in it, my real website has many web pages, files, folders, and applications, such as various versions of Moodle.

Link to Rick's MoodleCloud (example of linking to Moodle)
Link to Moodle 4.5 Courses (just an example of other Moodles on this website)
I might also link to other applications, like WordPress (example).
And I might want to link to individual files and folders.
mydomain.com/simple_word.docx
mydomain.com/simple_pdf.pdf
mydomain.com/course_support/
mydomain.com/course_support/simple_word.docx
mydomain.com/course_support/simple_pdf.pdf
public_html (i.e., webroot and document root, the same)
(note: document root allows index.html to show at root domain.)
├── index.html
├── simple_word.docx
├── simple_pdf.pdf
├── simple_html.html
├── (many other files, such as html, doc, jpg, etc.)
├── (many other folders, such as courses, professional, family, school, js, images, css, etc.)
├── moodle50
│ ├── index.php
│ ├── (other Moodle files)
│ ├── (many other Moodle folders)
├── wordpress
│ ├── index.html
├── course_support
│ ├── course.html
│ ├── simple_word.docx
│ ├── simple_pdf.pdf
├── images
│ ├── master_course.jpg
├── css
simple.zip (a zip file containing items in this website)