https://help.minecraft.net/hc/en-us/articles/360058525452-How-to-Setup-a-Minecraft-Java-Edition-Server

This guide is a mess.

As a prerequisite, you should make sure you have Java installed and up to date on the computer that will host the server so it can run .jar files. 
The Java version linked here is Java 8, so it is entirely unusable for the Minecraft server jar.

You can check if Java is installed in command prompt by typing without quotes “java -version”. 
Why do we not bold and italic the command here? We do that later. Also, can we use code blocks please?

Copy this address to your clipboard. 
Not an address.

Type without quotes “cd” hit space and then paste the address you just copied, then hit enter. 
Not a sentence. Makes no sense.

Java -jar “name of your jar”.jar
Why are we using capital Java keyword?

Hit enter and after running the command, you will notice a failed to load properties error along with failed to load eula.txt.
Not a sentence. Makes no sense.

You will also see a “server.properties” file if it does not appear like an editable text file, right-click it and click “Open with” click “More apps” if you are on Windows 10 and scroll down and select your text editor or notepad. 
Not a sentence. Makes no sense.

the  query.port setting as this is the port you will need to forward on your local router to allow other inbound connections.
No you don't. And why is there a double space between "the" and "query"?

Spawn-protection specifies the radius...
Why are you capitalizing the field name here but nowhere else?

You may want to adjust this to how much RAM you have dedicated to your server. 
This is extremely vague. RAM in GB? What? 

This is an official guide. Mistakes like this should not happen.