What is the core difference between Selenium WebDriver and Selenium Grid?
WebDriver is a tool used to automate web browsers. It can be used with any browser on any platform (Firefox, Chrome, Safari, etc). WebDriver is the official tool that comes with Selenium.
Selenium Grid is a tool used to manage multiple instances of WebDriver in one place. If you want to run tests against many different browsers or platforms, use Selenium Grid to manage those WebDriver instances.
Read more: Selenium Grid Setup: Basics and Getting Started Tutorial | LambdaTest