Scientists have struggled to prove if dreams really help solve problems. A new study focused on people who often have lucid dreams. In the study, participants tried to solve puzzles while awake. Each puzzle had a unique sound. Some puzzles were easy; some were left unsolved. Participants then slept in a lab. During REM sleep—the stage with vivid dreams—researchers played sounds linked to unsolved puzzles softly. They wanted to see if people would dream about those puzzles and solve them after waking. The results were clear. Playing sounds helped participants dream about matching puzzles. Some even signaled they were thinking about puzzles while still asleep. The next morning, puzzles that appeared in dreams were solved much more often than those that did not. However, just hearing a sound in a dream was not enough—dreaming about the puzzle was key. Not all participants showed the same results. Those who dreamed more about the cued puzzles improved more in solving them. Lucid dreams were not always better than normal dreams; sometimes, non-lucid dreams led to more solutions. This suggests unconscious dreaming may be better for creativity since the brain can make unusual connections freely. The study had some limits, like a small number of participants and some forgotten dreams. Also, thinking about puzzles after waking could affect results. Still, the study offers strong evidence that dreaming during REM sleep helps solve problems. It also shows dreams can be guided by cues. These findings hint that dreams are not random but can support creativity and problem-solving, opening new doors for future research.