A simple beginner guide to IELTS band descriptors for Listening, Reading, Writing, and Speaking. Learn what examiners look for, how bands 5, 6, and 7 differ, and how to upgrade with clear checklists and mini tasks. Includes Bangla notes for key terms so you can understand fast and apply in practice. Use the pocket rubrics, example sentences, and daily drills to raise accuracy and fluency step by step.