Sometimes it is good to write without any resrictions of format, and this is called free verse.

Even though there is no rhyme or metre to free verse, it is still classed as poetry as it uses poetic language; figurative language such as alliteration, similes, metaphors etc rather than natural day to day conversation. Also, it doesn't have any set number of syllables etc, but is separated into verses and has some construction and order unlike a piece of writing.

There are no specific 'rules' to how free verse is divided into stanzas (verses), but it is generally just separated where it feels appropriate, much like starting a new paragraph in a piece of writing. The verses don't have to be equal in size.

In the same way the line breaks are done according to how the writer wants the words to be stressed, and which stresses feel more natural.