Okay try again...

Use brackets like this (but I have to put spaces in or it won't give you the example and will only make it hidden lol)

[ trigger] Text here. That opening bracketed word "trigger" tells the site what to do, and then you have to also 'close' that command and you do so by typing [ /trigger ]

As I said, don't add the spaces between the brackets [] and the word 'trigger' or the '/trigger'