[Publish] Why does my Facebook data appear differently in the Overview Report compared to the Analysis Report?

We've created the new  Overview Report to be more accurate and robust, using Facebook's own enterprise-level data service. The Analysis Report doesn’t use this same enterprise-level data infrastructure, and can therefore be less accurate than the Overview Report. This means that sometimes, the Analysis Report might show different values for the same metric on the Overview Report.

So why do we even keep the Analysis Report around? Great question! In the coming months, our intention is to have the Overview Report completely replace the Analysis Report. However, we don’t yet have as much historical data in the Overview Report as in the Analysis Report, and we’ve found that many users still therefore rely on the Analysis Report for their monthly workflows. We're keen not to cause any disruption to your current reporting methods and therefore we'll be keeping the Analysis Report around for a little longer!