If you are looking to add UPI (Unified Payments Interface) as a payment method specifically for Facebook Ads, you can follow these steps: 1.) Go to the Facebook Ads Manager website and log in to your Facebook Ads account. 2.) Click on the "Billing" tab in the left-hand menu. 3.) Under the "Payment Methods" section, click on "Add Payment Method". 4.) From the list of available payment methods, select "UPI" or "Unified Payments Interface". 5.) Follow the on-screen instructions to link your UPI ID (Virtual Payment Address) with your Facebook Ads account. 6.) Once your UPI ID is linked, you can use it to make payments for your Facebook Ads campaigns. If the UPI option does not appear as a payment method for Facebook Ads, contact Meta support for further assistance. Please note that payment methods and their availability may vary depending on your location and Facebook's policies. It's always recommended to refer to the latest instructions provided by Facebook or contact their support for up-to-date information on adding UPI as a payment method specifically for Facebook Ads.