Q: nsurlsessiond? what the heck is it and how to get rid of it!

Hi Apple Community,

Over the last month I have noticed problems with bandwidth and ability to perform simple tasks online greatly restricted.

Have used over 20GB in a single day on several occasion, the most being 57GB in a single day.

Using activity monitor to monitor whats going on, i have noticed a process by the name of nsurlsessiond. it seems to be eating through a lot of data ? what is? how to stop it? and why has it just started becoming a problem?

Any info, suggestions or experiences on this would be appreciated.