What does the blue + icon in the 'Customer' field do?

What does the blue + icon in the 'Customer' field do?

This icon opens a shortcut to the customers contact details.  You can click on the customers phone, mobile or email to directly contact the customer, but any action completed here will not be automatically recorded within AutoPlay.  Instead this shortcut can be used to schedule follow up, send an AutoPlay video email response or allocate the lead without having to open the full lead.