First of all, the Writing Module is divided into two parts Task 1 & Task 2. Maximum 6 bands can be expected in writing an essay, and only 3 bands for writing a letter or graph. Most candidates generally don’t write anything in their life.
The International English Language Testing System, or IELTS, is an international standardized test of English language proficiency for non-native English language speakers. It is managed by the IDP. IELTS is one of the major English-language tests in the world.