It is impossible for the hundreds of search engines on the internet to collate and maintain their own databases. They display the results on the Search Engine Results Page (SERP)
Often, many different search engines work together in the collation of data. This is why it is possible that the primary and secondary pages of the search results be similar in different engines, as the same search engine, will share this data with the others. These directories can also be used by third parties. This complicated supplier receiver relationship that is important to be studied for ranking high on the SERPs
Relationship between search engines.
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