The article sustains that for consciousness to exist, it should have an evolutionary advantage. It could be something emergent from the complexity of the brain,

The article sustains that for consciousness to exist, it should have an evolutionary advantage. It could be something emergent from the complexity of the brain, having a language or different capabilities (pattern matching, cognitive biases, story telling, etc) that enable us to make sorts of long term future predictions, to name a few. And all of them do have evolutionary advantages.