As stated previously, Selenium WebDriver provides a standardized API that allows us to automate browser activity. Each browser provider and third-party project has developed its own specific browser driver, in order to be compatible with Selenium WebDriver.

For example, if a testing team plans to automate tests with Selenium WebDriver and execute the scripts in Chrome, they will have to download its specific driver application in advance. This must be done for all of the browsers that the team wants
to use.

GeckoDriver (Firefox), ChromeDriver (Chrome), and IE Driver (Internet Explorer) are the most frequently used drivers, and they follow the guidelines of the Selenium framework.