Reasons for week-to-week data changes in FastTrack reporting or other expedited reporting are primarily due to indexing completion and ingestion of 3rd party metrics as detailed below. We recommend that you use the latest file of year-to-date (YTD) data to ensure these changes are accurately captured in your reporting.
Weekly reports contain 95% of the advertising running in the FastTrack universe. Owing to the difficulties inherent in expedited data gathering, occasionally some advertising will not make it into the report for a given week. Missing information is included in reports going forward.
Initial spend estimates are frequently based on proxy historical audience and cost-per-audience information. Data is recalculated for subsequent reports as final third party metrics become available. These include SimilarWeb impression data (for digital media), Nielsen ratings data (TV), and SQAD average costs per rating point (TV).
Spend estimates for any week within a given month generally settles or locks approximately 3 weeks after the close of its month. At this point, we will have received and applied all expected final audience and cost-per-audience inputs (some of which are issued monthly) into our spend methodology calculations.