Key takeaway. Sites localise on city and ISP, not only country; matching the ASN of a real local user is the difference between the shopper's page and a generic one.
Country targeting is table stakes. City, ZIP and ASN targeting change what a page shows you, and sometimes whether it shows you anything.
Article body pending. This post exists as an index entry with its takeaway; the full text is written by the editorial team. Nothing here is generated to look finished.