Read the following text then answer the question!

    Hi my name is Rembulan Sinar Purnama. Last Wednesday was one of the special moments for my sister, Rintang, because she had a graduation day and graduation party. She got the best score from her university. It was excited to know about the good news. Therefore, I congratulated her by saying, "It was great to hear about your score. Congratulations!" she replied by saying. "Thanks a lot, my lovely sister."

    There were my father and mother who gave her a gift. They gave a car to my sister then they congratulated my sister by saying, "Congratulations for your graduation and best score." My sister was really happy to get their congratulation and the gift. There were also many of her friends who came to her graduation party. Her friends said," Congratulations!" to her and they hope my sister would get the best in the future forever.

"Congratulations for your graduation and best score."
What is the meaning of the underlined expression in Indonesia?