It is no big deal but I detest IQ tests because they seem much of hype and many of them are losing their values. Think it from the traditional Weschler to progressive matrices to Mensa. One thing common to these measures, abstract thinking.
Regrettably, many of life’s problem can rather be solved creatively by devising new ways or solutions.
Back to the question:
What does an IQ of 115 mean?
It is an average IQ score.
Don’t understand? Look at the diagram of normal distribution for IQs above, you would see where it falls within the spectrum, you are averagely intelligent if you have this IQ.