Yahoo announced a search update to their index. The update includes possible updates to Yahoo's crawling, indexing, and ranking algorithms.
Dan Rampton, Yahoo's Product Manager said:
The Yahoo! Search engineering teams are rolling out updates to crawling, indexing, and ranking algorithms. Similar to previous updates, you may notice some ranking changes and page shuffling during the process, which we expect to complete over the next few days.
I have not seen much discussion around fluctuations in Yahoo's search index recently, but maybe some significant changes are coming soon? [...]
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