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Expand Up @@ -141,6 +141,10 @@ All users with Protocols admin or read-only permissions can view transformations

Transformations introduce advanced logic that at scale may impact performance of client-side libraries. If you are interested in testing new functionality which supports device-mode destination transformations in analytics.js, contact your account rep.

### Are Destination Filters applied before or after my Protocols Transformations?

That depends. If you are working with source-level Transformations, the Protocols conversion will come first. If you are dealing with a destination scoped transformation (which is set to only impact data going to a specific destination), Destination Filters will be applied prior to Protocols Transformations.

### Why do I need Protocols to use transformations?

Transformations are but one tool among many to help you improve data quality. Segment highly recommends that all customers interested in improving data quality start with a well defined Tracking Plan. The Tracking Plan serves as a roadmap for how you want to collect data. Without a clear roadmap, it's nearly impossible to build alignment around how transformations should be used to improve data quality, leading to more data quality issues than it solves.