Chicago's online sellers are largely distributors, and that single fact reshapes every part of an SEO program. The rail yards, the industrial belt around O'Hare in Elk Grove Village and Bensenville, the foodservice and restaurant-supply trade, the printing and promotional-products business: these are companies whose customers are other companies, buying repeatedly, on terms, from catalogs that were built for a paper era and later poured into a web store.
Search behavior follows. A Chicagoland buyer arrives with a manufacturer part number, a dimension, a NSF or UL designation, or a competitor's SKU they need a substitute for. They are not browsing. Winning those visits means cross-reference pages, spec tables, unit-of-measure clarity and datasheets that are indexable rather than trapped in a PDF nobody linked. It also means the site must survive being enormous, which is where most of these catalogs fail: filter combinations multiply into millions of URLs and the pages that matter never get crawled.
Conversion is different here too. Plenty of these businesses take quotes rather than card payments, run negotiated pricing, or connect to a customer's procurement system. An SEO program measured in transactions will report failure on an account that is working perfectly, so the measurement model has to be built around quote requests, account creation and reorder rate from the start.
The location does genuine commercial work. From Chicagoland, most of the US population sits within two days by ground, which is why so much national distribution runs through here and why lead-time content converts.