What causes 'bad sectors' on a hard drive?

hello my friend… sorry but that user anwser was not vague…  Regular everyday use is for example writing and reading a lot of  data from the hard drive…

the substancial amount of time  is hours for example 10-12 hours or turned on 24h for a day

Our drives could die at any moment… is only developing bad sectors so you can recover the data

what i think is that the probability of developing bad sectors is higher when more bytes are crunched in the platter

so normaly old hard drives are better at this porpose but lacks storage capacity lol