Targets are basically identifiers associated with locators (CSS selector or XPath) that we can refer in the tests
Adding Target with CSS Selector
When you change name of an existing target, the new name will be reflected in all the test cases referring to it
Adding Target with XPath
You can edit targets as CSV. After clicking on Edit as CSV button you get a modal window where existing targets presented as lines of target/locator pairs separated with comma.
Editing Targets as CSV