First of all, how do we know if our core is strong/weak? Poor posture, back pain and having difficulty sitting up straight are symptoms of a weak core.
People often think that doing sit up would help. Yes it does help. However, by just doing sit up is not enough to build a strong core. Compound exercise and functional training is the way to go! Beginners may start off with squats and deadlift. It's important to get all fundamentals right before progressing!
Also, get your posture and movement right before attempting to lift heavy weights. Purpose of weights training is to make us stronger and Not injuring ourselves!
Having a strong core doesn't mean perfect ABS will show. A strong core WITH a low fats percentage yes, chances are high that your ABS will show.
Yes we know the importance of having a strong core. Apart from that, we strongly believe that Strength, Stamina and Agility are equally important as well! Do not neglect any of them!