The great thing I found about Peardeck was that it got my usually quiet and reserved students to engage and participate in a way that they are unwilling to do during class conversations. It also allowed students to easily and freely share dissenting opinions without fear.
The REALLY interesting thing, though, was that after using Peardeck in class a handful of times, my usually quiet and reserved students were MUCH more willing to share out their ideas during discussions, and those students with dissenting and minority opinions were less reserved and more willing to open up a dialogue.
Peardeck does require that you and your students have Google accounts, and it is really designed for and aimed at classrooms where every student has a device (ideally 1:1). I used it with classes that were not 1:1 where we had to reserve a cart or travel to a lab and this resulted in having to craft a class around using the tool. This year, I anticipate using it much more regularly in my 1:1 classes, as we will be able to simply use as it we need, whenever we need.