Spectra Trade Areas is used to evaluate the impact of your competition on your stores and can connect with any other data we offer to better understand your shoppers in a particular trade area. This comprehensive store database, which is created using Nielsen TDLinx®, covers more than 21,000 grocery, drug, mass merchandise, club, convenience and gas, and discount stores. Spectra Trade Areas is updated quarterly and includes modeled probabilistic geographic trade areas based on several attributes, including store sales and competition, as well as the distance between a store location and neighbouring dissemination areas.
Below is an additional resource linked for your reference.
Using the Retail Interaction Tool
How-to-Read ENVISION Reports
Spectra Trade Areas and Weighted Metrics