Is teeth night guard really worth buying..?

I hope you all are doing well, I hope its a perfect place to ask, I wanna know about teeth night guard or dental watchmen whatever you wanna say, it's really helpful for our teeth in the night? I personally wanna know about it, because I saw pretty good discount deals on it on Teeth Night Guard Coupons, but I personally don't have any experience to use it, so plz let me it's worth buying or not.