Can you embed any website?
Only secure web sites can be embedded. Make sure the URL of the web site begins with HTTPS. Not all websites allow their pages to be embedded, so you may not be able to embed them, even when they are secure and use iframe-based embed code. If you have problems, check with the website to see if they allow embedding.
What is checkout payment?
Checkout.com Is an International Payment Platform that Processes Different Payment Methods Across a Variety of Currencies. Its fee structure depends on a number of factors such as card type, merchant's location, and the consumer's issuing bank, with fees passed directly to the merchant.