HP Instant Ink delivery and HP ePrint are the two web-connected printing services. The availability of these services depends on your country, region, and printer model.
HP Instant Ink: For eligible printers in some regions or countries, HP Instant Ink works as an ink cartridge replacement service at a low cost. The printer will transfer the ink level details to HP through the web. When the printer machine ink levels are low, HP sends replacement ink cartridges automatically to you.
HP ePrint: A secure cloud-based service, HP ePrint enables users to send print jobs from anywhere with active internet access. All you have to do is send the document or photo (you want to print) via email to your printer.
Read more: How to Turn On Web Printing Services on HP Printers