Answer:
Meter is regarded as a significant element of poetry and is defined as a unit or pattern of stressed and unstressed syllables that adds rhythm and melody to the poetry or verse. It functions to add a linguistic sound pattern to the literary work. Iambic tetrameter is a kind of meter comprising of four iambic feet. It displays four 'iambs' or metrical feet in each line. Each line consist of four feet/beats of one stressed and one unstressed syllable. An example that demonstrates this meter could be as follows:
"She walks in beauty like the night
of cloudless climes and starry skies;
And all that's best of dark and night
Meet in her aspect and her eyes; "
...("She Walks in Beauty" by Lord Byron)