Google has altered its extended database results and decided to stop labelling supplemental results, though the supplemental index will still be used.
The Official Google Webmaster Central Blog announced the changes on July 31st with articles entitled Supplemental Goes Mainstream and Google Dumps the Supplemental Results Label.
A series of improvements have been made to the Google system for crawling and indexing supplemental results to make them more comprehensive and fresher.
The ‘supplemental results’ label has now been removed from search results within Google.com and Search Engine Land reports that Google has been granted a couple of patents this year that refer to results from extended databases.
Google launched the supplemental index in September 2003 to enable it to index more pages from the Internet without having to search through billions of them unnecessarily.
The search giant uses two main indexes to create search results – the regular database and supplemental results. This type of result is drawn from websites that Google considers to be of less significance than those in the main database and the search engine marketing industry works to ensure that their websites do not end up in the supplemental results list using techniques such as search engine optimisation.