A more thorough explanation:

Definition: Persona grata is a Latin term that means an acceptable person, especially a diplomat who is welcomed by a host country. It is the opposite of persona non grata, which means an unwelcome person.

Examples: A foreign ambassador who is well-liked and respected by the government and people of the host country is a persona grata. This means that they are accepted and trusted to represent their own country's interests in the host country. On the other hand, if a diplomat behaves inappropriately or engages in activities that are not in line with the host country's laws or values, they may be declared persona non grata and asked to leave the country.

The concept of persona grata is important in international relations because it reflects the level of trust and cooperation between countries. When a diplomat is persona grata, it means that they have established good relationships with their counterparts in the host country and are able to work together effectively. This can lead to positive outcomes such as trade agreements, cultural exchanges, and diplomatic solutions to conflicts.