Hey, if I search for "foobar" - https://www.google.co.uk/search?q=foobar https://www.google.co.uk/search?q=foobar then there's no yellow box, google doesn't hav

Hey, if I search for "foobar" - https://www.google.co.uk/search?q=foobar https://www.google.co.uk/search?q=foobar then there's no yellow box, google doesn't have any relevant ads! But if I search for "life insurance quietly" - https://www.google.co.uk/search?q=life+insurance+quietly https://www.google.co.uk/search?q=life+insurance+quietly - ADS! This is a total non-story, caused by not understanding keyword matching algorithms. If you add words to a query, it turns out your query becomes less related to potential keywords that have been targeted for adverts, and this drop in relevance might be enough to cross the threshold where adverts are shown at all