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Sales
Lightning - Save and Add Products on Opportunity Button Prompt Users to Add Products to Opportunities
Edit the Forecast Category in Salesforce for Android, Salesforce for iOS, and Salesforce Mobile Web Change Opportunity Forecast Category
Easy Way to Create Mass Email Expand Your Reps’ Email Reach with List Email
Allow Mass Content Delivery via Email
Mass Email Directly from a List View
Ability to Mass Email Contacts within Lightning
Display the Email Subject for Mass Emails In Activity History Keep Track of List Emails in the Activity Timeline
Filter More Ways in the Activity Timeline
Automatically Filter Out Mass Emails from Activity Reporting Keep Track of List Emails in the Activity Timeline
Filter More Ways in the Activity Timeline
Ability to Reposition Reminder Fields in Activity Layouts Make Sure Your Reps Never Forget to Remember with Task Reminders
Bring Pop Up Reminders for Tasks and Events to Lightning Experience
Lightning Experience Should Display Archived Activities Get Your Fill of Past and Archived Activities with All Activity History
Account, Contact, Leads Merge

Data.com Duplicate Management: Provide a Merge button on Duplicate Record Set

Merge Accounts with completely unrelated Account Names

Merge contact function is limited

Wrangle Duplicates Using Duplicate Record Sets in Lightning Experience
Ability to merge records using the Lightning Experience Merge Person Accounts in Lightning Experience
Service
Send Images on Outbound Social Posts Help Your Customers by Attaching Images to Social Posts
Track Knowledge Article Searches and / or Views by User Track Article Views with Event Monitoring
Knowledge Article Viewed Date / Voted Date Filter in Reports Track Article Views with Event Monitoring (partially delivered)
Wistia video embedding in KB articles Embed Videos and Code Blocks in Knowledge Articles
Please enable embedding Youku videos to articles to serve Chinese customers Embed Videos and Code Blocks in Knowledge Articles
Knowledge Article Assignment Reporting Follow the Flow with Article Assignments
Customization
More than 4 fields on Related List in Lightning Experience View Related List Data Quickly with Related List Quick Links
Make Used Licenses / Total Licenses from UserLicense object Generally Available Changed Objects
Visual Workflow / Flow translation for labels and fields Translate Flows from the Translation Workbench
Support for Flows in Lightning and Salesforce for Android, Salesforce for iOS, or Salesforce Mobile Web

Add attribute to flow:interview component to render flow in the Lightning UX

Add Flows Anywhere in Salesforce with the Flow Lightning Component