We see hiring as a collaborative process so it is very important that communication between team members is simple and visible in real - time.
You can leave a note to each candidate profile and every member of your team can see it. Once you wrote it, simply click Save note (blue arrow). If you wish to add an emoji or attach something, simply click the icons on your left (yellow box).
Also if you want to mention somebody from your team, simply add @name and he/she will get the notification at Inbox. The person needs only to click on left menu and on the new message (blue arrows) to see the comment.
If you wish to see the Team Activities simply click on your left menu and you have filters to help you define your search as you wish.