택배[package]

courier service[s] = delivery service

express delivery service: express가 붙으면 고속의 느낌.

track one's package online. = 배송 상태 확인하다.

I need to send this package. What do I do?

(나 이거 택배로 보내야 되는데. 뭐하면 되지?)

In that case, you can go to a post office. Or, you use just one of those courier services.

They come to pick up your package,

Really? That's really convenient.

They also have delivery services at convenience stores. 

[편의점에서도 택배 서비스를 할 수 있어]

Just drop off your package there. Someone comes to pick it up. And you can track your package online.

the U.S postal service.

vendor: 판매인, 서비스를 제공해주는 회사.

They offer tracking for your packages.

priority package: 가장 먼저 보내야 하는 택배.

overnight delivery services = 그 다음 날 배송되는 서비스

choose what length of time you want it and you pay accordingly.

[택배 걸리는 시간 고르고 그에 따라 돈을 지불해요.]