{afterpage} is a package that provides a means of running commands immediately after the current page is output.
afterpage implements \afterpage{<stuff>} that causes the commands specified in its argument to be expanded after the current page is output. For example, LaTeX's float positioning mechanism sometimes gets overloaded and all floating figures and tables drift to the end of the document. One may flush out all the unprocessed floats by issuing a \clearpage command, but this has the effect of making the current page end prematurely. Now you can issue \afterpage{\clearpage} and the current page will be filled up with text as usual, but then the \clearpage command will flush out all the floats before the next text page begins.
