A “test course” typically refers to training in Software Testing, covering fundamentals (planning, design, execution, tools like Selenium/JIRA), automation, performance, and Agile/DevOps, with options from free intros to advanced certifications (ISTQB) via platforms like Coursera, Udemy, NPTEL, or dedicated academies like FITA, Testleaf, Testbook. These courses build skills for identifying bugs, writing test scripts, and ensuring software quality, with paths for beginners to advanced professionals.