The article delves into the use of ID locators in Selenium WebDriver, emphasizing their speed and reliability due to their unique identification of elements on a webpage. It acknowledges, however, that IDs are not always unique due to developers' practices, which can necessitate switching to other locators. The text provides practical demonstrations using examples from Facebook and Airbnb to illustrate how to employ ID locators within Selenium scripts. Additionally, it underscores the importance of understanding and correctly implementing ID locators while cautioning against the pitfalls of duplicate or autogenerated IDs. The article is written by Sadhvi Singh, a QA Manager with extensive experience in various testing techniques and tools.