Customer List is a first-party list of customer or prospect identifiers uploaded to a platform for matching, suppression, or targeting.
It matters because Reddit rewards relevance, authenticity, and community context. Brands that understand the platform’s terminology can build campaigns that feel useful to users instead of interruptive.
Example
A retailer uploads an appropriately permitted customer list for platform matching. It checks match results and exclusions, recognizing that an uploaded address is not a promise that the corresponding person can be reached with an ad.