Standing on a stage is read as being seen, judged or celebrated. Forgetting your lines points to fear of being exposed; a good performance to confidence you may not yet admit you have.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.