The answer to this question really depends on the individual's personal tastes, experiences, and values. There is no one "right" answer when it comes to what constitutes a meaningful poem. However, many great poets have written works that offer insight and evoke emotion in the reader.
One example of a meaningful poem is William Butler Yeats' “The Second Coming.” This poem intimately examines a world full of chaos, featuring vivid and evocative language. It offers a sense of comfort in the face of seeming madness, and can be interpreted in many different ways depending on the reader.
Another classic poem is Robert Frost’s “The Road Not Taken.” This poem speaks to the universal experience of choice, and the need to embrace whatever road we choose in life. Its message is timeless, and one that readers often return to during moments of reflection and self-doubt.
Finally, Pablo Neruda’s “Tonight I Can Write” is a meaningful poem that speaks to the power of emotion. It examines the intensity of love and desire, the ephemeral nature of life, and the idea of beauty in the smallest moments. In sum, it takes an honest, personal look at what it means to be human.
Ultimately, there are many poems that can be incredibly meaningful to individuals depending on their experiences and outlooks. While the poems above are some of the classics that often come up as meaningful, readers may find special, personal connections with other works of literature.