What does "walks of life" mean?

[kaokala]

English Error, Elementary Level

ESL/EFL Test #12 "At the Finance Company Again", question 4

I enjoy the personnel contact with them as they come from all walks of life and are all ages.

(a) personnel
(b) them
(c) are

English Error, Elementary Level

ESL/EFL Test #12 "At the Finance Company Again", answer 4

I enjoy the personal contact with them as they come from all walks of life and are all ages.

Correct entry: personal
The error was: (a) personnel

You have found the error and your entry is correct.
_________________________

" walks of life", what does it mean?

thanks,
kaokala

[Happytofita]

To meet people from different walks of life, means to meet people from different social classes, different occupations, different set of minds, etc.