CLEAN : Transit strike in Paris: "I thought there would be a lot of people, but everything is going well"

What is the significance of the word 'Hello' in communication?

How does greeting someone with 'Hello' affect social interactions?

In what contexts might the word 'Hello' be used?

Can you describe a situation where saying 'Hello' is particularly important?

What are some variations of the greeting 'Hello' in different cultures?