Can you help me? What are the principles behind understanding Korean comments?

Hello, my name is Beam and I'd like to consult about reading Korean clinic reviews. I'm currently trying to find a clinic for maintenance, but the problem is, I'm not good at reading Korean. It's like I can only find English reviews or translated ones. I'm afraid the reviews I see might be unreliable or perhaps even advertisements from the clinics themselves.

I'd like to ask how everyone checks reviews? Are there any red flags we should watch out for? For example, what kind of messages would make me think, "Hmm... is this legit?" How should I trust reviews to be safe? All I can think of is contacting the clinic directly and asking a lot of questions, but I don't even know what to ask. Honestly, if anyone has had similar experiences, could you please share your tips with me?