I was flagging a question, when I received this message from SO
Attention: some of your recent flags have been declined - please review them before flagging this post!
But, I found no option for reviewing. What should be done here?
The idea is that you go back to your flagging summary and check your declined flags. And try to understand why they are declined.
So you can cast flags that are valid in the future.
The number of flags you can cast each day depends on the overall validity of your flags.