"good 4 u" is a hit single from Olivia Rodrigo's debut album "SOUR", released in 2021. The song is characterized by its explosive pop-punk energy, angsty lyrics about a breakup, and a powerful chorus that contrasts with more subdued verses. It draws clear inspiration from early 2000s pop-rock and punk bands, marking a departure from the piano-driven ballads she was initially known for.