HP printer setup is a website that provides instructions for setting up and installing HP printers. To begin the setup process, users need to visit the website and enter their printer model number. Once the model is identified, users can download the appropriate printer driver software and follow the on-screen instructions to complete the installation. The website also provides troubleshooting guides and frequently asked questions to help users resolve any issues they may encounter during the setup process. By following the step-by-step instructions provided on the 123.hp.com/setup website, users can quickly and easily set up their HP printer and start printing documents, photos, and more.