A virtual assistant is a self-employed professional who works remotely, typically from home, to provide administrative and technical support services to clients. They handle tasks like scheduling, email management, social media, research, and more. Some key advantages of hiring a virtual assistant are flexibility, the ability to work from anywhere, and gaining experience in different fields. However, virtual assistants also face disadvantages like lack of benefits, setting their own schedules around client needs, and distractions of working from home. Effective virtual assistants require skills like time management, customer service, communication, and a positive mindset.