In Selenium, the driver.close() and driver.quit() methods are used to close the browser window that is being controlled by the WebDriver. However, there is a key difference between these two methods:  driver.close(): This method closes the current browser window that is being controlled by the WebDriver. If multiple windows are open, the other windows will remain open.  driver.quit(): This method closes all windows that are being controlled by the WebDriver and shuts down the WebDriver process. It also kills your driver.exe file which ultimately closes everything.  Overall, the main difference between driver.close() and driver.quit() is the scope of the action. driver.close() only affects the current window, while driver.quit() shuts down the entire WebDriver process and closes all open windows. It is important to choose the appropriate method based on the needs of the test.