My Notes in Skype for Business is a quick way to start your own personal notes about your Meeting. This can be quite handy. Click on the Present icon in your meeting and then My Notes (or CTRL+N):
A OneNote page will be opened with Date/Time and Meeting Participants inserted already. The participants are live Contact Cards to the Skype for Business users, so if you hover you will see their presence and can take action and collaborate:
One Minute Office Magic 