welcome to the forum julio. i dont hunt deer with a shotgun so i dont have one on mine, but my hunting buddies that do some of them have scopes on theres. they say they feel more comfortable shooting with a scope if they are getting out past 50 yds or so.
a lot of people say to add a red dot scope bc it makes it some what easier to focus on what ur shooting, i would say it depends on the range your looking at. i have a regular 4-9 zoom on mine but i shoot well out to 100 yards, some people say thats too far with a shot gun but i have results to prove it to myself. So beyond 50-75 yards i would start looking towards a standard rifle/shotgun scope for better acuracy.