IELTS band score tells the English language ability a person has to score. The band score can be given between 1-9. After you take your IELTS test. Your IELTS marks will be converted to a band score of 1-9 for each and every section, which is listening, speaking, reading and writing. The band score is given based on how fluently you are able to speak English language and to check whether you are eligible to travel abroad, maybe education’s sake or for work purposes.