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A simple webhook is a way of knowing when an event has happened in the world of REST APIs. Instead of asking a server if there is the data you’re looking for, webhooks are a better way to get the data. You open an endpoint on your server and create a “subscription” with the server you”re trying to get data from. Once the server accepts the request, it would start sending data to the “Subscription’s” you made whenever it is available. If you use webhook, Terra will tell you when requests are made when they are done, when reviews are done.