A stanza is a related group of lines or verses in a poem. A stanza also can be a verse in paragraphform. They can keep on going without punctuation. It may also be a line poem.
Two most important features of a stanza is the number of lines and the rhyme scheme. There are many kinds of stanza.
Two-line stanza ().
Three-line stanza ().
Four-line stanza (, , , )
Five-line stanza (for example )
Six-line stanza (for example )
Seven-line stanza (for example , it is called rhyme royal)
Eight-line stanza (for example , it is Italian ottava rima)