A stanza break is a space between groups of lines in a poem, similar to a paragraph break in prose. It signifies a pause or a shift in tone, theme, or perspective within the poem.
Stanza breaks can affect the pacing and flow of a poem, allowing the reader to absorb the meaning of earlier lines before moving on. By visually separating ideas or sections, stanza breaks help to highlight contrasts or transitions, giving the reader a moment to reflect on the content. In many ways, they act as a guide to the emotion or narrative structure of the poem, helping to enhance the overall reading experience.