Meter

The rhythm of a piece of poetry, determined by the number and length of feet in a line.

example:

u / / u 
Iamb: hello Trochee: Under 

itis important to poetry because it a piece of poetry and it makes it sound beter and the reader can understand it

Rhyme

Correspondence of sound between words or the endings of words, esp. when these are used at the ends of lines of poetry.
"Yes, the zebra is fine.
But I think it's a shame,
Such a marvelous beast
With a cart that's so tame.
it is important to poetry because it corresponds with each stanza and how poetry is supposed to be.

Rhythm

Rhythm: A strong, regular, repeated pattern of movement or sound.

example: 

roses are red violets are blue.

Rhythm is important to poetry because it makes the stanza sound nice.

Onomatopoeia

Onomatopoeia is formation of a word from a sound associated with what is named 
example of Onomatopoeia: 
Knock knock jokes are examples of Onomatopoeia.
Onomatopoeia is important to poetry because it makes poetry better and can make you acually understand it better

Personification

The attribution of a personal nature or human characteristics to something nonhuman
The stars danced playfully in the moonlit sky

Personification is using a character to represent an abstract idea. Abstract ideas are hard for a lot of people to understand

 

Imagery

Visually descriptive or figurative language
My work is mainly inspired by old advertising imagery, naive drawings and textile design
Imagery creates a vivid image by playing on the senses

Simile

Simile is when you compare two nouns (persons, places or things) that are unlike, with "like" or "as."

Your teeth are like stars;

They come out at night.

They come back at dawn

When they’re ready to bite.

Good similes compare two very different nouns