The idea is this... it's a PING button within the ticket view. (or estimate, invoice, etc)

The main purpose is to bring attention to a given ticket.

Example:
Admin / Manager notices a ticket is stale, they can make a comment in the ticket, email the tech with the URL, or some other method... but a "PING" this ticket... will send a direct notification to whatever notification is set for attached tech / rep. (or, click PING drop down: SMS, Email, Direct Message, ... etc)

Staling ticket; admin presses 'PING' --> alert sends to tech that ticket needs more immediate attention. Or something along those lines.