To give you the most useful information, Search algorithms look at many factors and signals, including the words of your query, relevance and usability of pages, expertise of sources, and your location and settings. The weight applied to each factor varies depending on the nature of your query.

Google Search is a fully-automated search engine that uses software known as web crawlers that explore the web regularly to find pages to add to our index.

Search engines work by crawling hundreds of billions of pages using their own web crawlers. These web crawlers are commonly referred to as search engine bots or spiders.

It's the means by which data is organized and structured so that search engines can generate relevant search results. Search indexing can transform any and all data and file types into searchable data. The goal is to make searching as fast, accurate, and relevant as possible.