The longer dimension of the topic is generic gyaan about: What is UPI? How UPI works? Who can use UPI? What can we do with UPI on WordPress? WP has plethora of eCommerce avenues: WC (WooCommerce) | EDD (Easy Digital Downloads) | GF (Gravity Forms) | GiveWP | etc. Most of them have some Indian payment gateway extension/add-on/plugin. BUT Payment Gateways charge a transaction fee + Need documentation, approvals, integrations and the odds. Moreover, if do not have a registered Firm/Company, the process gets more complicated. What if you are Tutor, Coach, Musician and anyone, who would like to collect payment in the most simple manner, without fees/deductions and moreover without the headache of dealing with ‘hazaar’ procedures. IF simply direct payment is required. UPI is the best solution. WP – at the core is a publication tool, thus widely adopted. If collecting payment can be as simple as a STICKY POST, what else do you need 🙂