...product advertisement hosted on a site I am looking to find advertisement related to yahoo instant messeneger that would be hosted on all the sites (is this possible to find out on google search engine) with help of suitable search string. Please help it is very urgent.

__________________
I Love Yahoo! Answers

It is not easy to find a particular advertisement that is currently running adverts because most of these publishers running the adverts are using an ad server. Ad servers are not indexed by the search engines because often these are javascripts that search engines can't read.Plus, advertising campaigns come and go, and many advertisers have the option of running the campaign on one website longer than on other websites.Unless there's a blog or site out there that documents the various internet advertising campaigns big companies are running, then that's the only time you can find out about the campaign. Otherwise, if it is an ongoing ad run on ad servers, you can never find it -- unless you stick around a website you suspect is showing the ad and keep on refreshing the page until the ad you want shows up.

__________________
I Love Yahoo! Answers