Which of the following best describes a notary public?

A notary public is best described as an individual commissioned to perform notarial acts. Their primary role is to serve as an impartial witness in the signing of important documents, ensuring that the identities of the parties involved are verified, and that they are signing voluntarily and without duress. This commission is granted by the state, conferring specific duties and responsibilities.

The notary's duties include administering oaths and affirmations, witnessing signatures, and certifying copies of documents. This role is pivotal in preventing fraud and ensuring the integrity of documents, especially those involving legal or financial transactions.

The other choices do not accurately reflect the functions or responsibilities of a notary public. For instance, the role of conducting financial transactions pertains more to bankers or financial professionals rather than to notaries. Serving on a jury relates to civic duties and legal obligations, which is distinct from the notarial responsibilities. Finally, practicing law without a license is illegal and is not associated with the role of a notary public, whose functions are clearly defined and regulated by law.