Under the General section of the Settings dialog, there is a single option:
Use data from all fleets in Frotcom
By default this setting is turned on and means that, when calculating Trip Outliers, Frotcom Analytics will use anonymous data from all other relevant fleets.
What this means is that data from other accounts will be used to help determine what are the "usual" behaviors when travelling between two places. Note that no other information is disclosed to the user (including account names, license plates, driver names and dates). This allows for richer samples leading to more precise outlier predictions. Also, data is only gathered for same-type vehicles (light or heavy).