What does 親善大使（しんぜんたいし）　mean? The dictionary defines it but, it is used a lot such as...
彼女は女優として活躍する一方で、「親善大使」として貧しい子供たちのために世界中を回っている。

Shinzen taishi is used a lot. I also heard it in a game too. What does it mean exactly?

Question

What does 親善大使（しんぜんたいし）　mean? The dictionary defines it but, it is used a lot such as...
彼女は女優として活躍する一方で、「親善大使」として貧しい子供たちのために世界中を回っている。

Shinzen taishi is used a lot. I also heard it in a game too. What does it mean exactly?

Answer

A shinzen taishi is a goodwill ambassador.  This title is often granted by UNICEF and other UN-related organizations to celebrities who work as representatives of the organizations to certain areas (behaving like ambassadors).  Audrey Hepburn was one of famous goodwill ambassadors for UNICEF.  Since these people are just volunteers and not representing the organizations from political perspectives, they are titled "goodwill (honorary)" ambassadors.