Fiduciaries are advisors who hold registrations that permit them to provide financial advice and services for fees.
There is no guarantee you will receive competent financial advice from a fiduciary. However, the key to this standard is ethics, not competence.
Fiduciaries are required by law to put your financial interests ahead of their own. That means, when they recommend an investment, it should benefit you more than it does them.
Make sure your advisor acknowledges he or she is a fiduciary in writing. You have better odds of getting financial advice you can trust.