I suddenly found out that I do not know how to send money to another country, can you tell me through which services and banks this can be done?

I have been searching for a long time for a system that can be used to pay for international orders, since I am the owner of an online store and often accept orders from various countries, I could not work with some of them because I could not accept payment in them. In Skrill review I like its ease of use and the speed of translations, which perfectly helps me in my work