Welcome, the idea seems pretty interesting! This is the first time I’ve come across it, but based on my quick research, it’s about tracking how institutional investors trade since they’re more knowledgeable than the average person. The idea is that we could profit by simply following their moves. It’s kinda like sports betting, where people suggest following sharp bettors because their expertise usually leads to success in the long run.
The SMC isn't as simple as we may be looking at it and especially not for the small hand trader that are struggling just to maintain a good trading portfolio. The smart money concept requires a certain level of access to premium informations about the big whales. You'll have to study about their portfolio roll and strategies, engaging in key webinars and also participate in conferences in few cases just to know what you're doing as you carry on (all of these demands resources). I think we should just juxtapose this concept to that of buying of trading signals except that in this case of SMC the trader is only tracking what the whales do and trying to replicate it for their own advantage too.