First, head to your ConvertFlow website's integrations area...

Click to connect with Customer.io...

In Customer.io, go to Settings > Integrations > Manage API Credentials to find your Customer.io site ID, tracking key and app API key.

Please note that the "tracking API key" and "App API keys" are separate. You may want to create both tracking and app API keys just for ConvertFlow.

Then, copy and paste these into the ConvertFlow integration creation fields.

And now Customer.io and ConvertFlow are connected!

ConvertFlow will now start pulling in your account data so you can trigger automations and segment subscribers in Customer.io as your visitors submit your ConvertFlow forms, landing pages, surveys and more.