Upwork is an online freelancing platform that connects businesses and clients globally. It allows freelancers to create profiles showcasing their skills and experience, and clients can post projects requiring specific services. Freelancers submit proposals and bids for projects. If selected, they work with clients through Upwork's project management and payment tools. Upwork benefits both freelancers and clients by providing access to new opportunities, flexibility, and cost-effective solutions for businesses to find qualified freelancers for their needs. However, success requires navigating competition between freelancers and clear communication between clients and freelancers to ensure quality work.