Yes.

Once certified, you can apply NLP Master Practitioner techniques in:

Coaching

Therapy-based approaches (where appropriate and within your scope)

Personal development work

However, you are responsible for:

Operating within your local regulations

Using techniques ethically and appropriately

Yes.

Once certified, you can apply NLP Master Practitioner techniques in:

Coaching

Therapy-based approaches (where appropriate and within your scope)

Personal development work

However, you are responsible for:

Operating within your local regulations

Using techniques ethically and appropriately