These codes can be used to access different codes from the system in your post and other places that have a Content. For e.g. you could display a block right here, or show the current server time and so on. There are two ways to call codes, the ones are dynamic codes/script that first will run and then display the result, these codes are always entered like this{script}arguments{/script} , the other way is to display defined values, for e.g. current time and date and so on. These variables can be accessed like this %VARIABLE% . All Global Settings constants/defnitions can also be accessed this way.