Cladding being removed from tower block

The video concludes with a warm and friendly farewell message, wishing viewers a nice day.

What does the phrase 'Have a nice day' imply?

In what contexts might someone say 'Have a nice day'?

How can the phrase 'Have a nice day' affect someone's mood?

What are some alternative phrases to 'Have a nice day'?

Why is it important to wish others a good day?