Top 5 Teeth Whitening
Ketone Test Strips (actually relevant!)
Shelf Data Strips - UK
Pay Less Interest (not sure what that one's about or relevance to urine test strips)
Secret Hotels Marylebone (I work in marylebone)
So one in eight is relevant, one might just possibly be if I wanted a hotel near work, and the rest totally wasted.
They're usually rather more on target than this - e.g. if I get a mailing from an RPG list most of the links will be people like Wizards of the Cost etc. - but this goes to show how contextless common words can mess up a search.