What is the song by Avril Lavigne about?

The song "Sk8er Boi" by Avril Lavigne is a pop-punk song that tells a story about a rebellious teenager named Tony who gets into trouble. He meets a popular girl named Avril and falls in love with her, but she is not interested in him because of his poor reputation. Tony keeps running into her and her friends and she starts becoming interested in him. At the end of the song, Tony is successful and respected. The song is about teenage angst and the power of love and friendship.