Dreaming that you are cheering reminds you to think carefully about what you do and not regret it in the future because of impulse.
Dreaming of hearing others cheering reminds you to calmly judge the truth, not to be deceived by the current situation or other people's exaggeration, and make impulsive decisions.

Interpretation of Dream Cheers in Ancient Books:
Outside dreams cheer, good things are coming. 'Broken Dream Secretary'