Search engine optimization (SEO) is the practice of improving a website's visibility in search engine results pages (SERPs), so that more visitors arrive from unpaid, organic results. It covers site structure, page content, page code and links from other sites.
History of SEO
Creator: No single creator. Bruce Clay is credited with spreading the term. Year: 1997.
Website owners began to optimize pages in the mid-1990s. Their target was search engines. Early search engines, such as ALIWEB, required site owners to upload index files by hand. Most did not rank results by formula. Automated crawlers later found sites. They also indexed them. So owners started to optimize meta tags and other search signals.
Danny Sullivan was an industry analyst. He later worked at Google. He reports that the full phrase search engine optimization (SEO) first appeared in a meta tag in August 1997. The SEO firm Bruce Clay, Inc. says its founder helped spread the term.
Some early methods gave weight to certain HTML attributes. Site owners used that weight to change their rankings. Search engines later changed their methods to reduce such abuse.
In 1998, two Stanford University students built Backrub. They were Larry Page and Sergey Brin. Backrub was a search engine. It used the PageRank algorithm. The algorithm rated the prominence of pages. They founded Google the same year. Links from other pages became one of the signals that ranked results. This changed how site owners worked on inbound links.
By 2004, search engines used many secret factors. The factors reduced link abuse. Google, Bing and Yahoo do not disclose their ranking methods. Google released the Panda update in 2011. Panda targeted content quality. Penguin followed in 2012 for link spam. Hummingbird followed in 2013 for natural language processing. BERT followed in 2019 for query understanding.
In the 2020s, digital marketers began to optimize pages. They optimized for artificial intelligence (AI) answers. They use two names. The first is answer engine optimization (AEO). The second is generative engine optimization (GEO). Google states that AI Overviews and AI Mode need no extra technical optimization. They need no technical work beyond the requirements for appearing in Search.
The basic work stays the same. Google Search Central lists the steps. The steps cover crawling and indexing. They also cover internal links and sitemaps. Bing Webmaster Tools lets a site owner submit a sitemap. It also sets the crawl rate. It tracks the index status of pages. Both sources state the same aim. A page must be found first. It must then be read and understood. Only then can it rank.
Changelog and latest update
Search engines change their ranking systems many times. Wikipedia lists these Google updates as named updates. They are Panda in 2011, Penguin in 2012, Hummingbird in 2013 and BERT in 2019. Each update changed how Google scored content, links or queries. Site owners adjusted their pages after each change.
Google Search Central publishes changes to its search documentation. It uses a dated updates page. The entries for October 2026 include a page. The page is on the UGC (user-generated content) Fresh Data Program. They also include an update to the guide on generative AI content. The updates page lists each change.
Google's snippet documentation was last updated on 20 April 2026. The update added a section on read more deep links. These links sit inside a search snippet. They lead to a section of the page. The page also explains how the title and description of a page feed the snippet.
Latest update: Google Search Central updates, 2026-10-08
Google added documentation for the UGC Fresh Data Program on 8 October 2026. The new page explains the purpose of the program. It explains who can apply. It also explains how to take part. On 1 October 2026, Google updated the guide on generative AI content. The update added information. It came from the Search Quality Raters guidelines. Site owners should check the updates page each time they change a page.
Usage examples
SEO (search engine optimization) work changes the HTML of each page. It also changes the robots file and the sitemap. The examples below show four pieces. They show a title and description in the page head. They show a canonical link. They show a robots directive. They show the sitemap line in the robots file. Each example is a standard form that Google and Bing read.
<head>
<title>Blue Widgets | Ex Co</title>
<meta name="description"
content="Blue widgets for home.">
</head>The title element gives the link text that a search result shows for the page. The meta description holds a short summary. Search engines may use it in the snippet. Each page should have its own title and description.
<link rel="canonical"
href="https://ex.co/services/">The canonical link names the preferred address of a page. This applies when the same content can be reached at more than one address. Search engines use it to group the copies. They also use it to show one address in results.
User-agent: *
Allow: /
Sitemap: https://ex.co/sitemap.xmlThe robots file sits at the root of the site. The Sitemap line tells crawlers where the sitemap file is. The Allow line lets crawlers read the whole site. The User-agent line applies the rules to all crawlers.
<meta name="robots"
content="noindex, follow">This tag asks search engines not to list the page in results. The follow value lets crawlers keep following the links on the page. Use it on pages such as thank-you pages. Those pages should stay out of search results.
References
These sources are outside Websnoogie and were checked on 2026-10-12.
Search Engine Optimization
Wikipedia
Encyclopedia article on SEO. It covers the history from the 1990s, the Google algorithm updates, the 1998 PageRank system, the terms used for AI answer optimization and the way search engines sponsor SEO conferences and publish webmaster guidance.
SEO Starter Guide
Google Search Central
Google's basic guide to search engine optimization. It explains how Google finds pages, what makes a page clear to search, and the steps that help a site show in Google Search results. It is the first document that Google gives to new site owners.
Google Search Central Updates
Google Search Central
The dated list of changes to Google Search documentation. The entries for 1 and 8 October 2026 are the latest updates used on this page.
Sitemaps Overview
Google Search Central
Google's guide to sitemap files. It explains the XML format, the robots.txt Sitemap line, and how a site owner submits a sitemap for crawling.
Bing Webmaster Tools
Microsoft Learn
Microsoft's documentation for Bing Webmaster Tools. It covers the sitemap submission, the crawl settings and the index status reports that site owners use to check how Bing reads a site.
Spam Policies for Google Web Search
Google Search Central
Google's rules on practices that break its search policies, including link spam and cloaking. The page states the last update date and gives examples of each practice.
Moving a site without losing search traffic
Search engines remember each address on your site. When a site moves to a new host, those addresses must still work. A move that breaks them can lower your visibility in search. SEO (search engine optimization) means the work that helps pages show up for the right searches. A careful transfer protects that work. We plan each move with the old addresses in hand.
Your search rank can drop when a site moves, so the transfer needs care. For normal-size WordPress sites, the transfer is free. Other sites cost $199 one time. We check the size first, so you know the price before we start. During the move we keep the page titles, descriptions and redirects the same. Then we check that each old address leads to the matching new page.
Reach us by phone any day between 7 am and 10 pm. Call 402-813-4034 with your domain and your current host. We will tell you whether the transfer is free and what the next step is. If you need more search work after the move, we explain that plan and its cost in writing.
Send us your domain name and a short note about your site. We will reply with a plan for the move. Or request the $300 website, which we build with SEO set up from day one.
