Meaning of 'to be treated to sth'

[Butterfly]

`to be treated to sth`
What does it mean?
I suppose it means you do sth that you enjoy/will give you pleasure ...Or maybe it means something completely different...

[Alan]

Hi,

To treat someone to something is give them a special surprise. You could treat your friend to a meal in a good restaurant. That means you pay the bill. It is as we say your treat. The person who receives this treat would then say: I had a lovely surprise yesterday as I was treated to a meal in a very good restaurant.

A
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English as a Second Language
You can read my ESL story Word Story: Jokes