There are various ways to interact with audience online.
In case of smaller audience you can do it with direct contact via video conferencing platforms such as Microsoft Teams (https://teams.microsoft.com), Zoom (https://zoom.us) or Google Meet (https://meet.google.com).
In other cases, you can use interactive presentation platforms like Kahoot! (https://kahoot.com), Mentimeter (https://www.mentimeter.com), Ahaslides (https://ahaslides.com) or Quizizz (https://quizizz.com).
In the manual you can find ideas and more about how we used it in our research and practice.