While work progress is paramount, how people feel about their work is also important. Successful organizations want to make sure that everyone is comfortable with what they're working on. If there are issues, it's best to find out early so that people can support one another.
In Allo, based on the cadence you set when creating the OKR session, a pop-up will prompt up to everyone on the team to record their confidence level. It is on a scale from 0 to 5 with a 0.5 increment. After submitting, the score will be recorded on their personal page.