The most common topics in IELTS Writing Task 2 align with the IELTS exam syllabus. Popular themes include:

1. Education: For example, "Is online learning better than traditional classroom education?"

2. Environment: "What are the causes and solutions to plastic pollution?"

3. Technology: "How has technology impacted social interactions?"

4. Health: "Should governments fund public healthcare more extensively?"

Practice essays on these topics to familiarize yourself with their arguments and vocabulary. Reviewing model answers can also help identify effective essay structures and improve your writing skills.