How can I effectively use the writing a song format to create a catchy and memorable tune?

To create a catchy and memorable tune when writing a song, focus on crafting a strong melody with a simple and repetitive structure. Use catchy hooks and memorable lyrics that resonate with listeners. Experiment with different chord progressions and rhythms to create a unique sound. Consider the emotional impact you want the song to have and tailor the lyrics and melody to convey that feeling effectively. Collaborate with others to get feedback and refine your songwriting process.