In Selenium automation testing, locators help identify and interact with any element on the web page. For example, ID, Name, ClassName, XPath, CSS Selector, TagName, LinkText, and Partial LinkText are widely used to help you interact with the elements on the web page.
Identifying the elements may be an easy task, but your tests might fail due to the state of the WebElement (e.g., the element is not visible or the element is not clickable at point, etc.). In such cases, the tests might throw different Selenium exceptions such as NoSuchElementException, ElementNotVisibleException, etc.