Songwriting involves several disciplines. These include the ability to write a good story. Take that story an turn it into lyrics. The lyric need to have meter and rhyme. Then the words are fused with a melody. Therefore it’s important to write music. A knowledge of music theory is helpful in creating chord progressions. Then the song needs to take some sort of form like: Verse-Chorus-Verse-Chorus. Then there is the production where the song is recorded. Each of these elements come together in create a song.