Definition: a pair of successive lines.
Example: Where-e'er you find "the cooling western breeze,"
In the next line, it "whispers through the trees;"
If crystal streams "with pleasing murmurs creep,"
The reader's threatened (not in vain) with "sleep."
Significance: including couplets is important in a poem because adds some rhymes. It helps add some rhymes and figurative language. it make poetry better by making it better for kids to read and inspire them to read more because of the rhymes (maybe)