CBT helps you to understand your thinking and behaviour.
You'll learn skills that will help with your current problems and that you can apply to future problems.
It relies on a close professional relationship with your therapist. They will help you to recognise the difference between helpful and unhelpful thoughts, and teach you how to let go of the unhelpful thoughts.
Your CBT treatment program could be anywhere between 5 and 20 sessions, depending on your problem and the program you and your therapist agree on. It's likely to include some 'homework'. You'll work with your therapist to set some tasks to practise what you talk about. CBT can be used at the same time as relaxation techniques, breathing techniques, medication or supportive counselling.