Let's take a look at a typical pop song and label the parts as they'd usually (IMO) be labeled:
Beatles: "I Wanna Hold Your Hand"
(Intro)
Chord move: C to D, played 3 times, holding out D on the final time
(Verse 1)
Oh yeah, I'll tell you something
I think you'll understand
When I say that something
I wanna hold your hand
(Chorus)
I wanna hold your hand
I wanna hold your hand
(Verse 2)
Oh please, say to me
You'll let me be your man
And please, say to me
You'll let me hold your hand
(Chorus)
Oh let me hold your hand
I wanna hold your hand
(Bridge)
And when I touch you I feel happy inside
It's such a feeling that my love, I can't hide
I can't hide ... I can't hide
(Verse 3)
Yeah you got that something
I think you'll understand
When I say that something
I wanna hold your hand
(Chorus)
I wanna hold your hand
I wanna hold your hand
(Bridge - again)
And when I touch you I feel happy inside
It's such a feeling that my love, I can't hide
I can't hide ... I can't hide
(Verse 4 - same as 3)
Yeah you got that something
I think you'll understand
When I say that something
I wanna hold your hand
(Chorus - outro)
I wanna hold your hand
I wanna hold your hand
I wanna hold your hand
It's actually harder than you might think to find a song that's "typical" in every way. "I wanna hold your hand" doesn't have a pre-chorus, and it actually contains the bridge twice, which isn't very common. I suspect they did that because it would have been too short without it, and they repeated the 3rd verse as the 4th verse because it wouldn't work to go from the bridge straight into the chorus.
Here's another early Beatles tune that does have a pre-chorus: "She Loves You"
(Intro)
She loves you yeah yeah yeah
She loves you yeah yeah yeah
She loves you yeah yeah yeah yeah
(Verse 1)
You think you lost your love, well I saw her yesterday
It's you she's thinking of, and she told me what to say
(Pre-chorus)
She said she loves you, and you know that can't be bad
She loves you, and you know you should be glad
(Verse 2)
She said you hurt her so, she almost lost her mind
But now she said she knows, you're not the hurting kind
(Pre-chorus)
She said she loves you, and you know that can't be bad
She loves you, and you know you should be glad (oooh!)
(Chorus)
She loves you yeah yeah yeah
She loves you yeah yeah yeah
And with a love like that, you know you should be glad
(Verse 3)
You know it's up to you, I think it's only fair
Pride can hurt you too, apologize to her
(Pre-chorus)
Because she loves you, and you know that can't be bad
She loves you, and you know you should be glad (oooh!)
(Chorus)
She loves you yeah yeah yeah
She loves you yeah yeah yeah
And with a love like that, you know you should be glad
(Tag)
And with a love like that, you know you should be glad
And with a love like that, you know you should be glad
(Outro)
Yeah yeah yeah
Yeah yeah yeah
Yeah yeah yeah yeah
This tune has a pre-chorus that actually doesn't lead to the chorus the first time. Also, it doesn't have a bridge.