A colleague of mine made an online purchase today (probably one of many). Included in a thank you for purchasing message was the following paragraph:
“Please help us to reduce our sponsored search costs (and so reduce our prices) by adding us to your Favorites before you leave
So at least on person thinks that Google is capable of, and tracks, bookmarks. And that this would increase not only SERPs but due to relevancy reduce an associated AdWords cost.
I suppose it makes sense.
Anyone have experience of this?