If you are putting together the jigsaw puzzle, it means that you are trying to figure out some problem. The dream shows that before you felt asleep you were thinking about something a lot. These kind of dreams could also show that you are unable to relax fully, your mind keeps working, because you have too many thoughts. You should try to learn to relax. If you are make the jigsaw puzzle and some of the pieces are missing, it shows that you are feeling like something has been missing in your life as well.
Dream dictionary: Jigsaw Puzzle dream meanings
To see a jigsaw puzzle represents a mental challenge or a problem that you must solve. Missing a few pieces suggests that you are not well prepared to make a good decision. Seeing or doing a crossword puzzle means you must put up with a mental challenge.
If you dream about seeing a jigsaw puzzle in a dream, then it is interpreted as important meaning of the dream. This dream represents some questions in your waking life that needs to be resolved. If you see some of the pieces being missing, then it means you are feeling the lack of some information in order to solve particular problem.