These are required for any app. Failure to do so can lead to a automatic deny.
http://en.wikipedia.org/wiki/Haiku
A Haiku is three short lines. The first line contains five (5) syllables, the second line seven (7) syllables, and the third line contains five (5) syllables.
Haiku doesn't rhyme. A Haiku must "paint" a mental image in the reader's mind.
This is the challenge of Haiku - to put the poem's meaning and imagery in the reader's mind in ONLY 17 syllables over just three (3) lines of poetry!