Iambe is said to have created the iambic pentameter verse pattern in poetry. This is a metered verse with two different sounds, and it was named after Iambe. The iambic pentameter verse is used by many poets, one of which is William Shakespeare.
In the myth, Demeter, was sad about losing her daughter, Persephone. It was only Iambe who was able to make Demeter laugh. She did this by using poetry and wit to cheer Demeter up. When Demeter was not sad any more, the earth became fertile again. Iambe then became Demeter's first priestess.