If you want to use scoring during your quiz, please ensure that you have selected the scoring option to identify a correct answer when setting up the polls. Without correct answers, there will be no scoring or leaderboards.
Not all polls need to have correct answers if not desired.
Vevox will allocate one point per poll when a participant correctly answers the poll.
If a multichoice poll was set up in such a way that the participant needs to choose more than one correct answer, the system will only allocate one point per poll if ALL the correct options were selected by the participant.
The same would apply for the 'Ranking in correct order' poll.
When a participant fails to submit a response while the poll is open, no score will be allocated for that specific poll.
Read this answer on how to use the speed leaderboard/fastest finger scoring.