Which tool would be least effective for engaging an audience during a live event?

Blogger would be least effective for engaging an audience during a live event because it is primarily a blogging platform designed for writing and publishing articles or blog posts. While Blogger allows for the sharing of thoughts and information, it lacks real-time interaction and engagement features that live audiences typically seek.

In contrast, YouTube Live, Google Meet, and Google Groups support real-time communication and interaction. YouTube Live is designed for broadcasting live events where viewers can engage through comments and chat. Google Meet facilitates video conferencing, enabling participants to see and speak with each other, fostering direct engagement. Google Groups allows for discussions, but it often takes place asynchronously rather than in real-time during live events. Therefore, Blogger's static nature makes it less suitable compared to the dynamic engagement capabilities of the other tools mentioned.