Showering everyday can dry out your skin because it strips the natural oils off your skin but sometimes people need to shower everyday especially during the summer months when it gets really hot and you sweat more.
Or when you're working a job that gets you really dirty then you need a shower everyday to stay clean so there's nothing wrong with showering everyday except the potential to dry out your skin.
But you can always moisturize your skin after showering.
During the summer I shower mostly everyday because I almost always get drenched in sweat and need to remove that sweat from my body.
But in the winter I'll sometimes shower everyday but other times I may go a day without showering.