Dreams definitely have meaning. It's already been said and studied
They reflect your subconscious desires in your waking life or whatever scared you. Your subconscious emotions/feelings basically.
You'll dream of being naked, wake up, and recalled how you felt vulnerable in some way earlier in the day.
You'll run very slowly in your dreams, wake up, and recall lacking confidence and feeling weak earlier in the day with no control
You'll run very fast in your dreams, wake up, and remember you hit a PR in the gym the previous day.
You'll dream of being with a foid, wake up, and remember constantly stalking a foid's social media profile
You dream of being in a flood or overwhelmed by a giant tsunami wave, wake up, and realized that you we're flooded with emotions the previous day with zero control over your own life.