The structure in the song along with his explanation.

CHORUS: The chorus has the same melody AND the same lyric each time we hear it. The lyrics sums up the emotional heart of the song. It’s the section that listeners will  remember and want to hear again and again. Be sure to include your title in your chorus so listeners know what to call your song. The title is often in the first or last line, sometimes both.

VERSE: The verses all have the same melody but different lyrics. A verse takes us deeper into the feelings or situation that created the feelings in the chorus. Because the chorus is repeated three or more times, you can keep it interesting by giving listeners more information in each verse – something that reveals more about the chorus and deepens our feelings or understanding of it.

BRIDGE: The bridge has a different melody and lyric from any other section. It often provides a peak moment or a turning point in the song. You can use the bridge to reveal something hidden or add a twist or just come right out and say what you feel instead of expressing it in images.

PRE-CHORUS:  Sometimes there’s a short section at the end of the verse which creates anticipation going into the chorus.

HOOK: The “hook” is the most memorable line in the song. It’s in the chorus and it’s often the line with the title in it – the first or last line of the chorus