What is the difference between a test case and a checklist?

Test case — is a formalized set of steps, expected results, and conditions designed to verify a specific functionality or use case.

Check-list — is a list of items, actions, or checks that need to be performed. It is less detailed than a test case and serves for quick coverage of a wide range of checks or reminders of important points.

Criterion	Test case	Check-list
Detail level	High (includes steps, expected results)	Low (just items or actions)
Formalization	High (structured document)	Low (list)
Main goal	Detailed verification of a specific scenario	Quick coverage, reminder, exploratory testing
Result	Pass/Fail at the test case level	Is the item marked (Done/Not Done)
Usage	Regression testing, documentation	Exploratory testing, smoke testing