While the IELTS Listening test does not have a dedicated "dictation" section, nearly four out of the six question types (such as form, note, and summary completion) require you to write down exactly what you hear. Common pitfalls that lower band scores include:
Review subject-verb agreement rules; dictation trains your ear to catch these subtle micro-sounds.
Do not just listen to the tracks while driving or cooking. That is passive listening. You need active, painful concentration. Here is the 3-step Golden Method used by high-scorers with Volume 1.