Difference Between Field History Tracking And Feed Tracking in Salesforce

Hi Vikas,

Field History Tracking
You can select certain fields to track and display the field history in the History related list of an object. The field history data is retained for up to 18 months.

• You can track the field history of custom objects and the following standard objects.
  Accounts
  Articles
  Assets
  Cases
  Contacts
  Contracts
  Contract line items
  Entitlements
  Leads
  Opportunities
  Orders
  Order Products
  Products
  Service Contracts
  Solutions
• You can enable field history tracking for custom objects in the object’s management settings.
• You can turn off field history tracking from the object’s management settings.

Feed Tracking

Using Feed Tracking, users can see updates for records they follow in their Chatter feed.We can track only up to 20 fields per object.

• The following standard field types can't be tracked:
  Auto-number, formula, and roll-up summary fields
  Encrypted and read-only system fields
  The Expected Revenue field on opportunities
  The Solution Title and Solution Details fields on solutions

•    It won't show modified values and old values for Multi-Picklist and Long Textarea fields.                             History tracking shows the following:

  Prior value - old value.
  Current value - value.
  Who has done the changes - person who modified it.
  When it was changed - date and time of modification.

• Go to Setup --> Build --> Customize --> Chatter --> Feed Tracking.

Thanks