What is iCloud Contacts?
You can keep your contacts organized and easy to find using Contacts on iCloud. Changes you make appear automatically on iCloud.com and wherever you set up iCloud for Contacts, including the Contacts app on your iPhone, iPad, iPod touch, or Mac; and Microsoft Outlook on a Windows computer.
Each contact appears on a virtual card called a vCard. You can share vCards with others, and you can add vCards that are shared with you. See Export a contact as a vCard on iCloud.com and Import a contact on iCloud.com.
If you’re already using another iCloud feature, tap the feature’s name at the top of the iCloud.com window, then tap Contacts.