Connecting your calendar to Cooper allows you to add the people you've met easily. This is usually a group you trust more, and are already more familiar with. They can be part of your private professional network instantly.
Tap the big yellow "+" button on the bottom of the Network screen and select "From Google Calendar".
If you want to change the connection with your calendar, tap on the top right dot menu on your profile screen. Then select Settings and change your connection here.
We'll now import the people you've met over the last month, and anyone you'll meet going forward.
We do not email them. As a principle, we never email anyone that isn't already using Cooper. So don't worry; your contacts are yours.
When you disconnect your calendar, you will stop receiving new contacts and updated information from that source. You will not lose any of the contacts or information synced so far.
Also read "How do I connect multiple calendars?"