Hello, you can choose one of two integration methods: hosted payment gateway and payment system integration via API. Each has its own advantages, disadvantages and features. The integration of payment systems allows the client to immediately provide payment methods and make a purchase instantly. This is where psychology comes into play. The person who decides to buy is ready to part with the money right now. But after a short time, he may begin to doubt, find a more profitable option for himself, or even forget that he made an order. Therefore, sales conversion drops seriously. For those who are interested, visit https://payadmit.com/ to read information about a company that provides and integrates a secure payment system for e-commerce sites.