Issue in last refresh at time.

Hi,

I have added label in dashboard to get last refresh at date and time. It added from measure.
It took from balow measure,

= Table.TransformColumnTypes(Source,{{"Last refresh", type datetime}})

my questions are,
1. How is this work? If we added schedule refresh does this change with time to time ? 
2. If we didnt add schedule refresh, still dataset refresh and update last refresh at ?
3. If we shar power bi dashboard to the another pro licence holder, same schedule times apply ? or they want to schedule separately ?  
4. Does last refresh time update according to schedule time ?

5. I have pin live dashboard. Do we need to pin everything to separate page for update ?

Thank you