Do you know what HDR photos mean?

A new green project River Of Life ( ROL) had completed recently at the heart of capital of Malaysia Kuala Lumpur. This turn the meeting point of Sungai Gombak and Sungai Klang into a new landmark waterfront

I took this photo for a photography course I did through Shawacademy to practice HDR. Unfortunately, I don't remember much of what I learned there. Bummer! I think I just scanned through most of the