Purpose: This feature will helps to mark the item as free of cost in sales bill. We can able to make particular item as free of cost by marking them as free so that bill does not take the item cost.
Real Time scenario: If customer is purchasing many items and shop owner wants to give discount as one or two free ,Then they marked item as free in sales screen so item cost will not calculated for free item.
How to enable the free items configuration
Step 1: Go to settings->configuration->sales configuration
Step 2 : Sales->configuration->Enable free item as yes->update
Step 3: Go to sales screen->select the item->"Mark as free"->Done
Step 4: Now, the marked free item will be shown as "0" in sales bill.
Reports to be referred: G0 to Reports->Transaction summary/sales summary