Histogram bins function

screen link: https://app.dataquest.io/m/146/guided-project%3A-visualizing-earnings-based-on-college-majors/3/pandas-histograms

Hi, I cannot understand what bins parameter in histogram does.
Could you please help me with this?
Thank you in advance!

bins is the number of equal width or number of intervals.

I am also having problem with displaying the ranges: Can you see that the range beginning with 0?
then bars are not separated with lines from each other. how can I display them with lines between them?
Could you help me with these ones ?
Thank you very much beforehand!

Can you try changing the limits of x axis


It has worked.
Thank you again!