Popular music usually features a verse and chorus structure. Take the pop song example, "Super Trouper" by ABBA. The structure is summarised below and is very typical:
0'00 - Acapella introduction
0'14 - Instrumental introduction
0'30 - Verse 1
0'47 - Pre-chorus (this links the verse with the chorus)
1'03 - Chorus (the most catchy and climactic section of the song)
1'34 - Instrumental
1'50 - Verse 2
2'07 - Pre-chorus
2'23 - Chorus
2'57 - Bridge (this is often a more contrasting section within the song)
3'16 - Chorus
There is not really an introduction to Killer Queen, it simply starts with 6 finger clicks! Other than this, the structure of the song is very typical of a rock song. There is no bridge but, in typical Queen style, there is an electric guitar solo. This isn't a bridge because it follows the same chord progression as the verse.
Verse 1 (bar 3, 0'03)
Chorus (bar 15, 0'28) - Like "Super Trouper", this is the catchiest and most memorable part of the song.
Instrumental (bar 23, 0'44)
Verse 2 (bar 27, 0'52)
Chorus (bar 39, 1'16)
Guitar solo (bar 44, 1'26)
Verse 3 (bar 62, 2'02)
Chorus (bar 70, 2'17)
Outro (bar 79, 2'33) - like a classical "coda" to end the song.