Hello.
For first time I go form euro country to Poland with Revolut. I plan to do some shopping using card. Do I need to exchange in advance some euros to zloty in order to use best exchange rate at POS?
Is it recommended to exchange some euros to zloty if I plan ATM withdraw of zloty?
Thank you for any commnts
You don’t need to chance in advance. But it is a clever way to avoid the weekend markup. (More about how all thins works in the FAQs.) 
And beware of DCC, dynamic currency conversion. It is very common in Poland. Always pay or withdraw money in PLN and don’t accept the conversion a POS terminal or ATM might show you.
Thank you, Frank! Will do like recommended by you
Have a good trip!
(And study the FAQs, just in case you lose your phone, card, … while on the road)
Thank you.
All went nice. I changed some money to PLZ and their were used during my shopping.