Indexing refers to the process of adding web pages and other online content to a search engine's index. Indexing is a critical part of search engine optimization (SEO), as it is the first step in ensuring that a website's content can be discovered and ranked by search engines. Search engines use complex algorithms to crawl and index web pages, looking at factors such as content relevance, keyword usage, and backlinks to determine the quality and ranking of a page. Websites can improve their indexing by optimizing their content and metadata, building high-quality backlinks, and using sitemaps and other tools to help search engines discover and crawl their content more efficiently.

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