What is people skills?

[Kellermann]

I read from time to time in this forum that iq and people skills are inversely correlated above a certain point on the intelligence curve.

What does "people skills" mean?

1) Empathy? The ability to understand other people's feelings. This would mean that highly intelligent people likely have tendencies leaning towards psycopathy.

2) The opposite of autism? (I can't come up with the word for this). With autism being a condition where you are unable to communicate or form relationships and express feelings.

3) Being extroverted? Beginning to ramble?
I am a fairly introverted person. Does this mean that I have worse "people skills" than extroverted people?