I remember back in the day when Padlet was Wall Wisher. That was a while back - I loved Wall Wisher, but it seemed to have a few issues - well NO MORE! Along with the name change, Padlet has gotten it together and is now one of my absolute FAVORITE websites (and apps) for sharing content and ideas.
So what is Padlet you ask? Padlet is, at the most basic level, an online bulletin board or virtual wall. You and your students can post information for others to view. But really, Padlet is so much more than that. Here are just a few ways teachers and students can use Padlet in the classroom - teachers can post questions that students can answer, students can provide feedback/evaluation of a project, students can upload their work for others to see, teachers can use it as a communication tool for parents, students can write book reviews, teachers can post links to video tutorials or websites to be used in research, and the list could go on and on.
I encourage you to take a look at Padlet.com (and the app). Here's a link to a video explaining how to use Padlet and it also has a few examples - https://youtu.be/8VcSQygAf6E.