*** title: Send impression data to analytics tools description: Guide for using Unleash feature flags keywords: 'send, impression, data, feature flags, unleash' 'og:site\_name': Unleash Documentation 'og:title': Send impression data to analytics tools max-toc-depth: 3 ---------------- Unleash allows you to gather [impression data](/concepts/impression-data) from your feature flags, giving you complete visibility into who checked what flags and when. What you do with this data is entirely up to you, but a common use case is to send it off to an aggregation and analytics service such as [Posthog](https://posthog.com/) or [Google Analytics](https://analytics.google.com/), either just for monitoring purposes or to facilitate [A/B testing](/guides/a-b-testing). This guide will take you through everything you need to do in Unleash to facilitate such a workflow. It will show you how to send data to Posthog as an example sink, but the exact same principles will apply to any other service of the same kind.