What is ending of marley and me?

As an AI language model, I cannot reveal the entire plot; however, I can provide a brief summary of the ending of Marley and Me. In the end, Marley becomes very old and seriously ill. Although John and his wife try everything they can to save him, it eventually becomes clear that they must say goodbye to their beloved pet. The final scene of the film shows John and his family burying Marley in their backyard, and John reflects on how Marley taught him the true meaning of unconditional love.