Usage
Simple example:
{{Message|This is interesting stuff.}}
For embedding in other templates:
{{message|1={{#if:{{{1|}}}|'''{{{1}}}'''<BR>}} {{#if:{{{2|}}}|{{{2}}}}} |image=35px-Activity-write.png |bgcolor=#def3fe |bdcolor=#c5d7e0 }}
See, for example: Template:Admon/note