Social media marketing is using social media platforms like Facebook, Instagram, and Twitter to promote a brand, product, or service. It has several key benefits for businesses including increasing brand awareness, driving higher conversion rates, improving customer satisfaction, and being a cost-effective promotion strategy. While social media marketing provides opportunities to build engaged customer communities and advertise to targeted audiences, it also has disadvantages such as being time-consuming, exposing businesses to negative feedback and security risks, and requiring constant user engagement to achieve results.