Auto insurance is one of the most fought-over advertising categories in the US. It’s a roughly $350 billion-a-year industry in direct written premiums, and because coverage is legally required in nearly every state, the competition isn’t about creating demand — it’s about being the name a shopper remembers the moment they start comparing quotes. That dynamic has turned GEICO, Progressive, State Farm, Allstate, and Liberty Mutual into some of the most consistent advertisers in the country, year after year,...