Hi there @californiamatt,

Thanks for sharing your question on the community.

Segmentation requests are processed as close to real-time as possible. This means your segment will update shortly after a customer takes an action that qualifies them based on the definition you created (e.g., placing an order or opening an email). In some cases, a high volume of segmentation requests across our customer base can cause delays.

• If you manually update a segment, it can take up to 15 minutes to process
• If you are monitoring a segment, updates can take up to an hour

Hope that helped!
Alex