The most common meter used in poetry is iambic pentameter (penta=five). Poets choose to use this meter when writing poetry because it gives the poem a strong underlying structure as a formal writing device. Iambic pentameter can be rhymed or unrhymed.

Why is iambic used?

In a poem about boredom, iambic pentameter may be used to make the poem sound monotonous like its subject.It is also interesting to consider the absense of iambic pentameter where it would usually be. For example, Shakespeare tends to write mainly in it.

What is the purpose of iambic meter?

Well, the answer to that question is rather simple — iambic pentameter is an iambic rhythm meter; and its purpose is to keep an “ear-pleasing” rhythm. Don't get hung up on pentameter, iambs can be used in a variety of different ways.