This is a template for an 'under construction' banner! To use it simply type {{Under construction}}.
You can also change the word "page" for another, by using the first paramter, such as {{Under construction|section}} will result in:
You can also add a reason as the second parameter!
Also, remember you can leave parameters blank in case you don't want to specify any! Such as {{Under construction||This doesn't list all the types}} results in the box above