Generally, the answer to this is really simple. The regular conditioners need rinsing every after its use. Meanwhile, the leave-in conditioner is primarily required to be left into the hair after shampooing. Compared to a regular conditioner, a leave-in conditioner stays on the hair strand for longer hours thus making it look healthy and lustrous. Aside from that, a leave-in conditioner detangles the hair and makes it stronger. This is highly beneficial for styling hair easily. Additionally, this kind of hair product protects hair from environmental damage like pollution, sun, and extreme heat. Moreover, another benefit of using a leave-in conditioner is that it gives extra shine to color-treated hair.