What is a Real Estate Agent?
A real estate agent is a licensed professional qualified to help clients buy and sell property. They use knowledge of the local market, property values, and negotiation skills to facilitate real estate transactions for buyers and sellers. 
Agents may work in residential or commercial real estate and handle various aspects of the transaction, like running property searches, organizing or taking clients to showings, drafting purchase agreements, and negotiating real estate contracts. They provide guidance, support, and market insights to buyers and sellers. 
Real estate agents may specialize in specific areas or property types, like residential properties like apartments or single-family homes, or commercial real estate like office buildings or warehouses. Some agents may specialize in land sales or other types of real property. 
To list properties in the United States, individuals must possess a real estate license (unless they are the property owner.) To acquire a real estate license, a person must usually complete a course or a certain number of training and education hours. Depending on the city or state, licensees may also be required to complete and track continued education hours to maintain their real estate agent status. 

What is a REALTOR®?
A REALTOR® is a member of NAR, National Association of REALTORS® as well as a licensed real estate professional. So, in addition to their professional license, they have taken another step in their professional endeavors to join NAR and become a REALTOR®. The term signifies a dedication to professionalism and ethical practices in the real estate industry.  
Beyond the duties of a real estate agent, a REALTOR® pledges to uphold integrity, honesty, and client interests through NAR Code of Ethics and complete ethics training every three years. 
NAR and its affiliated Institutes, Societies, and Councils offer a wide selection of real estate training options. REALTORS® have access to exclusive resources and education, like C2EX (Commitment to Excellence), so they can offer clients an elevated level of service and commitment.  
REALTORS® gain networking opportunities, connecting with peers, mentors, and potential clients. Additionally, NAR advocates for favorable policies that support the real estate market, safeguarding members' interests.