Even though I gave you a few examples of sound devices you would probably understand it better if you saw them in actual poems. Below are a few examples of how sound devices were used in poetry.
With this poem it's following the rhyme scheme abab. Frog rhymes with log and be rhymes with me. This is an example of end rhyme because the words at the end of the line rhymes with the other words that is at the end of the line.
This poem that I have written uses the consonance sound device. As you can see the "sh" sound is repeated throughout the poem.