While you are staying in Poland, many times you have to take care of some matters at Polish offices or submit necessary documents or applications addressed to public entities.Doing so very oftentimes requires your personal appearance in the office. This takes a lot of time as well as effort, since not always Polish clerks will be able to communicate with foreigners.
This is why you should consider getting access to Polish ePUAP system, so you can deal with many official matters without leaving home.