Please explain the situation

[Tukanja]

Do help yourself to more chicken.

What does this mean?

1. I'm asking you for more chicken.
2. You are probably a good friend.
3. I probably do not know you very well.
4. You have paid a lunch to me.

Thanks

[Joe]

What exactly are you asking? It doesn't "mean" any of the four options.

[Tukanja]

I couldn't have answered the question properly that I asked for help.

This was the original question

Do help yourself to more chicken.

and these were the original answers

1. I'm asking you for more chicken.
2. You are probably a good friend.
3. I probably do not know you very well.

And I add this solution

4. You have paid a lunch to me.

To make this shorter I'll tell you what the answer was.

It was number 3. I probably do not know you very well.

I should probably have imagined the situation in which I am at a table with somebody having lunch.
It probably means that if I had known him very well I wouldn't have addressed to him using the sentence Do help yourself to more chicken.
What could be the way that I have told him to eat more chicken if I had known him very well I don't know.

Can you help about it.

Thanks

[Joe]

Do help yourself to more chicken. is certainly quite formal.

For friends you might say:
Help yourself to more chicken.
Help yourself.
Go ahead and have some more chicken.