What does it mean to 'Annotate' a poem?

I need to annotate various poetic devices in the poems, highlight particular lines and write comments or notes next to the poems. I have to deconstruct the poems and identify different techniques used. What does this include doing? And what are some examples of this? Does it include the use of Onomatopoeia, onance, Alliteration, Similes and Metaphors etc.? Thanks, all help would be appreciated, ASAP! :)