The Zendesk for Salesforce integration gives you the following functionality:
View Salesforce data within Zendesk. Enable your team to view Salesforce customer data about while working on a ticket, without having to leave Zendesk. Configure the Salesforce data you want to appear in the ticket, including custom objects and custom fields.
Send Zendesk tickets into Salesforce. View and report on all of your customer data across tickets, contacts, accounts, and more from within Salesforce. Send a complete ticket, including custom field data, into Salesforce with a configurable trigger. Determine which custom fields you’d like to appear in Salesforce, and automatically create links between a Zendesk Ticket and other objects in Salesforce.
Sync Salesforce Account, Contacts, and Leads with Zendesk organizations and users. Enter and maintain all of your customer information from Salesforce and automatically reflect those changes in Zendesk.
View the overview video to learn more about Zendesk for Salesforce v3.