StreetLight offers lots of different options, toggles, and types of Projects. Some data is useful for certain projects, some data is useful for others. This means your Project sample size will always vary. You will also see variance if you think about sample as a “device” penetration or as a “trip penetration.”
Sample Size will vary based on how you choose to set up your Project, including the data sources and data periods included in your analysis. For Location Based Services data, our “usable” device sample size includes 65M devices in the US and Canada. That's about 23% of the adult population in those two countries. For GPS data, our commercial truck sample represents about 10-12% of commercial truck trips in the US. Learn more in our Data Documentation.