Haiku as a poetry form is well-established, with hundreds of years of poets showing how to be thoughtful, witty, and appreciative in a very small amount of space. If you're not familiar, the basic summary of haiku is that it's a poetry form that originated in Japan and focuses on nature. The structure of haiku in Japanese is 17 characters called on that, similar to syllables in English, act as phonetic units. In haiku, these on are typically divided into phrases of 5 on, then 7, then 5. This is the familiar concept of haiku most people know, minus the part where haiku specifically focused in some way on nature. If you follow the structure but write about human nature, then congratulations, you've written senryu instead! When writing in English, it's a little more complicated, but the 5-7-5 syllable structure works just fine, but you can also opt for brevity, though. If you want to learn more, I wrote a journal about this for @projecteducate many years ago that you can read, and find