"Update all tests using the same test data" what does it mean?

Here the checkbox appears when updating Test Data for Test Case. what does it do?
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Hey!

We need take some test cases and paste it in to the excel, CSV or json…

This will test the each case and provide you the result

Reference:

Regards,
NaNi

whenever you are having the new test data you can update test particular for that from run option select run or debug with data variation

@THIRU_NANI @Veera_Raj I understand what Test Cases are but what
“Update all tests using the same test data” checkbox is for?