service which allowed users to view information on websites in Yahoo!
[1] In particular, it was useful for finding information on backlinks pointing to a given webpage or domain because YSE offered full, timely backlink reports for any site.
After merging with Bing Webmaster Tools, the service only offers full backlink reports to sites owned by the webmaster.
[2] Reports for sites not owned by the webmaster are limited to 1,000 links.
[3] Webmasters who added a special authentication code to their websites were also allowed to: