[nicolethenerd]

> Is EE shop sites you would have visited before the search?

No. I think you might be parsing his statement wrong - it's not "have searched" as in searched for previously, it's "have searched for a PRODUCT" as in, your search is for a product (something purchasable in a store, preferably an online store) as opposed to something else.

The Bloom filter figures out if your search is for a product, and if it is, puts that box w/ sponsored links to stores that sell that product up at the top of your results.