Learn how TikTok built global service accelerator (GSA) using open source code and multiple cloud providers compute and backbone Infrastructure, to accelerate TikTok's recommendation API traffic from all geographies to our high power recommendation engine on core sites. GSA significantly reduces latency to origin thus "For you" pages for end users with list of recommended videos become lightning fast. As we contribute our learnings in accelerating traffic in "How to build edge cloud" case study, we will also discuss how end user data privacy is at core of how we store and move citizens data in ones country and Increase data transit observability. We will also demonstrate how these privacy filters can be programmed at GSA .