Enable Quick Text to Access Text Shortcuts in the Gmail Integration
Where: This change applies to Salesforce Inbox, available for an extra cost in Group, Professional, Enterprise, Performance, Unlimited, and Developer editions, and at no cost in Essentials editions.
How: The Quick Text feature is on by default in Lightning Experience, and on by default in Salesforce Classic when Chat is enabled. To enable it, from Setup, in the Quick Find box, enter Quick Text Settings, then select Quick Text Settings. Click Enable Quick Text. No other quick text settings are required.