Dynamic currency conversion is when a shop or ATM converts your purchase into your own currency (pounds sterling) rather than keeping it in the local currency.
This sounds convenient, as you can see how much you’re paying in pounds, but the exchange rate you get is unlikely to be as competitive as the one used by your own card.
Mastercard’s and Visa’s exchange rates are about the best you’ll find anywhere, so if you’re given the choice, always stick to the local currency.
