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# What is server-to-server (S2S) and how does it work?

Source: https://usehardal.com/faq/what-is-server-to-server-s2s-and-how-does-it-work
Category: Core Solutions

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Server-to-server (S2S) is an endpoint that can send and receive HTML requests without requiring external setup. It allows you to feed data to platforms like Firebase and Adjust through your own servers, giving you control to enhance conversions and hash PII data before it reaches third parties like Google and Adjust.