This is the 3389th most frequent Russian word.
посол
Ambassador.
Here, "посол" refers to an "ambassador.", a person officially designated by a country to represent its interests abroad.
Посол представляет свою страну на международной арене.
The ambassador represents their country on the international stage.
In this example, "соли" is the genitive singular form of "соль," which can relate to "посол" speaking figuratively about seasoning.
Для правильного вкуса супа нужно добавить ложку соли.
To correct the soup's taste, you need to add a spoonful of salt.
"Посол" is used as a "diplomat," showing proficient and official negotiations.