# Subscription preference metrics Track unsubscribes from topics, monitor subscription trends over time with data-driven segments, and send subscription events to external systems. You can track subscription preference changes across campaigns, broadcasts, and newsletters—and send subscription events to external systems through reporting webhooks and data warehouse integrations. ## Metrics for subscription preferences[](#metrics-for-subscription-preferences) **You can [track unsubscribes from topics](/journeys/analytics/) across campaigns and broadcasts within the Journeys UI or through [reporting webhooks](#data-out-integrations).** *Unsubscribed from topics* counts each subscription topic that a user unsubscribed from through a delivered message. As such, you may see a percentage above 100; say you have 4 subscription topics and 5 messages are delivered to five users. Two users unsubscribe from 3 topics each (6 total). We would divide this by the number of delivered messages (5) to get 1.2 or 120% unsubscribed from topics. You can [read more about how our subscription center works in Customer.io](/journeys/subscription-center/#how-it-works). [**For campaigns and API-triggered broadcasts**](/journeys/campaign-metrics/#campaign-overview), you can find data in the Metrics tab under **Performance & Delivery Metrics** and **Message Metrics**. Check *Unsubscribed from topics* in the right hand column of Performance & Delivery Metrics to update the chart. Scroll down to Message Metrics to find the unsubscribed rate per message. Select on the right and check the box for *Unsubscribed from topics*. **For newsletters**, go to the Overview tab. You’ll find *Unsubscribed from topics* at the top of the table. You can also go to the [**Analysis Dashboard**](https://fly.customer.io/workspaces/last/journeys/analysis?channels=email_twilio_webhook_slack_in_app) to view unsubscribed rates across any campaign, newsletter, and API-triggered broadcast. Check which type of workflows you want to compare at the top. Then select the table icon to add *Unsubscribed from topics* as a column. ## Tracking subscriptions over time[](#tracking-subscriptions-over-time) You can track the evolution of the volume of subscribed or unsubscribed profiles for a subscription topic or channel by creating [data-driven segmentsA group of people who match a series of conditions. People enter and exit the segment automatically when they match or stop matching conditions.](/journeys/data-driven-segments/). The examples below use topic preferences, but the same logic applies to channel preferences. Use the attribute `cio_subscription_preferences.channels.` (for example, `cio_subscription_preferences.channels.push`) instead of `cio_subscription_preferences.topics.topic_` when building segments for channels.  Subscription preferences attribute Keep in mind that **users do not have a subscription preference attribute until their status has been explicitly set**, which means it is no longer the default status you set in your subscription center. As such, we’ll have to target attributes based on whether they exist as well as when they equal certain, boolean values. When creating a data-driven segment, a subscription topic will only show in the dropdown of attributes AFTER at least one person’s preference has been explicitly set for the topic. At this point, the topic will also show as an attribute in the data index. For this recipe, let’s say a workspace has 2 topics: an *opt-out* topic and an *opt-in* topic. Remember that **opt-out** means people are subscribed by default (they must opt-out to stop receiving messages) and **opt-in** means people are unsubscribed by default (they must opt-in to receive messaging). ### Tracking people that are *subscribed* to a topic[](#tracking-people-that-are-_subscribed_-to-a-topic) To track the evolution of subscribers to the 2 topics above, create 2 data-driven segments: **Opt-out topic** For an opt-out topic, people are subscribed if they have not unsubscribed from it, that is, their subscription comes from the default status of the topic (so the attribute doesn’t exist) or if they have explicitly subscribed to the topic (so the attribute exists and equals true). To track all people who are subscribed to an opt-out topic, set this condition: > Attribute `cio_subscription_preferences.topics.topic_` is NOT equal to `FALSE` [![Under the header and above the People table, you can filter by subscription status.](https://docs.customer.io/images/subs-center-filtering.png)](#72a0c42351c7e044689b030c72f97490-lightbox) where `topic` corresponds to the topic ID you can find in your workspace’s [subscription center](https://fly.customer.io/workspaces/last/settings/subscription_center/topics) or fetch through the [App API](/api/app/#operation/getTopics). **Opt-in topic** For an opt-in topic, people are subscribed only if they have explicitly subscribed to it (so the attribute exists and equals true). To track all people who are subscribed to an opt-in topic, set this condition: > Attribute `cio_subscription_preferences.topics.topic_` is equal to `TRUE` where `topic` corresponds to the topic ID you can find in your workspace’s [subscription center](https://fly.customer.io/workspaces/last/settings/subscription_center/topics) or fetch through the [App API](/api/app/#operation/getTopics). ### Tracking people that are *unsubscribed* from a topic[](#tracking-people-that-are-_unsubscribed_-from-a-topic) To track the evolution of unsubscribed users to the 2 topics above, create 2 data-driven segments: **Opt-out topic** For an opt-out topic, people are unsubscribed only if they have explicitly unsubscribed (so the attribute exists and equals false). To track all people who are unsubscribed to an opt-out topic, set this condition: > Attribute `cio_subscription_preferences.topics.topic_` is equal to `FALSE` where `topic` corresponds to the topic ID you can find in your workspace’s [subscription center](https://fly.customer.io/workspaces/last/settings/subscription_center/topics) or fetch through the [App API](/api/app/#operation/getTopics). **Opt-in topic** For an opt-in topic, people are unsubscribed by default (so the attribute doesn’t exist) or if they have explicitly unsubscribed from the topic (so the attribute exists and equals false). To track all people who are unsubscribed to an opt-in topic, set this condition: > Attribute `cio_subscription_preferences.topics.topic_` is NOT equal to `TRUE` where `topic` corresponds to the topic ID you can find in your workspace’s [subscription center](https://fly.customer.io/workspaces/last/settings/subscription_center/topics) or fetch through the [App API](/api/app/#operation/getTopics). ## Data-out integrations[](#data-out-integrations) You can use our [reporting webhooks](/journeys/webhooks/) to send information on whether a person is subscribed or unsubscribed from messaging and whether the status of any of their subscription preferences has changed. [![An admin selected all customer events for Subscribed, Unsubscribed, and Subscription preferences changed. On the right hand side, they also chose to send everytime the event occurs and checked the box for include body content.](https://docs.customer.io/images/subs-center-data-out.png)](#ff2230463f8993f11bec93772920f6eb-lightbox) In order to send the specific values of people’s preferences, check “Include body content and headers in all Sent events” to the right of the event checklist. We’ll also send subscription preferences as a part of the [*Attributes* schema in our outbound data warehouse integrations](/integrations/data-out/data-warehouses/data-warehouses-intro/#attributes-schema).