This is ensured by the fact that the search engine index is distributed across servers.

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The user's request entered into the search bar of the Yandex.ru website is transmitted to the load balancer.
The balancer determines a less loaded cluster of the search engine network and passes the request to it for processing.
Next, the spelling is analyzed, the subject and regional affiliation is determined, and the request is classified by type.
Then, the presence of similar queries that have been processed recently is checked. The cache of responses to queries is stored for some time to speed up the preparation of results. This allows for faster generation israel cell phone number list of results for popular queries. The popularity of such queries can be short-term (emergencies, global events, advertising campaigns of famous brands, etc.) or constant, associated, for example, with social networks. The user receives ready-made results for such queries.
If the check reveals that there is no ready answer to the query in the cache, it is transferred to the base search servers, which are performed in parts to speed up the process.
The responses from several basic search clusters are returned to metasearch and then passed through a ranking system that builds a generated output based on various criteria.
Ranking algorithms have a significant impact on SEO traffic, the success of online advertising, but the owners of search engines only announce the general principles of their work: high-quality content, usefulness of information, etc. Therefore, SEO specialists have to look for their own effective technologies for optimizing website pages to achieve maximum returns from an advertising campaign.