Use People Finder to look for people in the organization. Some of the uses include looking for contact information of specific people, or searching for someone who holds a specific position in a specific organization unit.
If the page is viewed in a card view, you will be able to see the pictures of employees you are looking for.
You can also click on a Call button to call the selected employee through e.g. Skype.
You can only view information that you have access to.
Call button calls the employee only if your device/browser/software supports calling and there is a phone number registered for the employee.