Here's the interesting thing about the title – it's not in English. In fact, "recuerdo" means "I remember" in Spanish. That's pretty fitting, all things considered: after all, it's a poem about remembering. But why not just call the poem "Memory" or, well, "I Remember"?
Well, we won't give you a crash-course in Spanish. That's why you have a high school Spanish teacher. But here's the upshot: "recuerdo" can be either a noun ("a memory") or a conjugated verb ("I remember"). In this particular case, it could be either – and that ambiguity makes us think about just how committed the speaker is to her memory.