Important topics to lean in Selenium

• Selenium Webdriver 3.x
• Java Concepts in details
• TestNG Framework
• Advanced Reporting
• Logging infrastructure with Log4j
• Page Object Model
• Page Factory Framework
• Data Driven Framework
• Executing tests on a remote machine using Selenium Grid 2.0
• Build Management with Maven
• Continuous Integration with Jenkins
• Database Testing
• Performance Testing
• Behavior Driven Testing Using Cucumber and Gherkin language