This house has been given a fresh coat of paint.

When was it painted?

I don't know.

Who painted the house?

I don't know.

(The present perfect passive voice is useful in describing something that happened in the past--but you might not know when or by whom the thing was done.)

This baby has been given a lot of love and care by its mother.

(You may use "it" for a baby unless you know the baby is a boy or a girl)

They have been assigned to work on a big project.

(In the picture, their boss--the guy wearing the tie--is telling them what to do.)

He has been tied up for several hours. A thief came into his house, tied him up, took his money, and left.

The Eiffel Tower has been visited by people from all over the world.