Can you list the main ways to automate web application testing using Selenium?

The main ways of automating web application testing with Selenium include:

• Selenium WebDriver — a programming interface for controlling the browser and performing user actions (clicks, text input, navigation).
• Selenium IDE — a browser plugin that allows recording and replaying tests without programming.
• Selenium Grid — a tool for running tests in parallel on different browsers and platforms.

Automation is often built on WebDriver using programming languages (Java, Python, etc.), where test scenarios interact with page elements, check their state and behavior.