Search engine optimization
practice and strategies of increasing online visibility in search engine results pages
Search engine optimization (SEO) is the practice of improving the visibility and overall performance of websites and web pages in search engine results pages (SERPs). It focuses on increasing the quantity and quality of traffic from unpaid (organic) search results rather than paid advertising. SEO applies to multiple search formats, including web, image, video, news, academic, and vertical search engines, as well as AI-assisted search interfaces.
SEO is commonly used as part of a broader digital marketing strategy and involves optimizing technical infrastructure, content relevance, and authority signals to improve rankings for user queries. The objective of SEO is to attract users who are actively searching for information, products, or services, thereby improving brand visibility, user engagement, and conversions.
History
Webmasters and content providers began optimizing websites for search engines in the mid-1990s as the first search engines were cataloging the early Web. Search engine users would query the URL of a page, and then receive information found on the page, if it existed in the search engine's index.
ALIWEB and the earliest versions of search engines required website developers to manually upload website index files in order to be searchable and widely did not utilize any form of ranking algorithm for user queries. The emergence of automated web crawlers would later be used to proactively discover and index websites. This led to website developers to optimize their website’s search signals, including the use of meta tags, to achieve greater visibility in search results.
“Search engine optimization” enters the record as practice and strategies of increasing online visibility in search engine results pages. Crown Archives preserves that source wording while asking what Search, engine and optimization can confirm, complicate or overturn.
Why this record matters
“Search engine optimization” is worth following because a concise public description often conceals a longer documentary argument. Here, Search, engine and optimization provides the most credible route into that argument.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 18, 2026. The linked authority identifier is Q180711. None of the 0 selected statements returned an explicit reference.
A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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Three-step research path
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- Expand the search: follow Search engine optimization primary sources, Search engine optimization archive and Search research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
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This entry incorporates text from “Search engine optimization” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.