搜索引擎优化的工作内容常被拆分为技术、内容、外链等模块,但从搜索引擎直接评估页面的逻辑看,更基础的分类是内容相关性、内容质量与内容可用性三项。Adobe Experience League在2026年8月更新的SEO基础资料中,明确将这三项列为Google等搜索引擎的直接排名信号[1]。采购SEO服务前先弄清这三项内容各自的官方依据、可核对动作与常见服务边界,能减少沟通偏差。
内容相关性的核心判断依据
内容相关性解决的是页面与用户搜索词是否匹配的问题。Google官方说明中,相关性首先体现在内容与搜索查询是否包含相同关键词,但不止于词面匹配,还会结合用户点击后的互动行为等因素综合判断[2]。这意味着关键词布局是基础,但不是全部。
标题是相关性信号中最直观的部分。公开统计显示,Google对搜索结果中标题链接的典型改写率在40%到60%之间,因此标题既要包含核心关键词,也要控制长度,通常建议在50到60字符区间,以降低被大幅改写的概率[2]。标题改写并不等于相关性失效,只是说明搜索引擎会根据具体查询调整展示形式。
正文结构同样服务于相关性表达。Google的SEO入门指南建议使用标题标签传递页面结构,虽然没有强制要求每页只能有一个H1,但跳过标题层级的做法不被鼓励,且标题文本本身对排名的影响大于标签层级数字[2]。采购服务时可核对服务商是否会梳理页面核心主题、规划标题层级与关键词分布,而不是只看是否堆砌关键词。
需要明确的是,meta关键词标签自2009年起就不再被Google用于排名,这一结论已被多次重申[2]。如果服务方案中仍将meta关键词作为核心优化项,可进一步询问其实际作用依据。
内容质量的评估框架与落地要点
内容质量是搜索引擎判断页面价值的核心维度,Google采用E-E-A-T框架进行评估,相关的反向链接、主题权威度等因素也会纳入排名考量[2]。2022年推出的Helpful Content更新进一步将内容质量升级为站点级信号,也就是说,一个域名下如果存在大量低质量内容,可能影响整个站点的表现[2]。
不同主题的内容质量要求存在差异。对于YMYL类内容,也就是涉及金融、健康、安全、法律等直接影响用户权益的主题,搜索引擎会执行更高的E-E-A-T标准,通常要求明确标注作者资质、引用权威来源、体现实际经验[2]。采购这类行业的SEO服务时,可核对服务商是否有对应行业内容规范,是否会协助梳理作者信息与引用来源。
非YMYL主题的质量要求更偏向实用性,即内容是否能真正帮助用户解决问题,而不是为了排名而生产[2]。服务商如果提供内容创作或优化服务,可要求说明其判断内容是否有帮助的具体维度,例如是否覆盖用户常见问题、是否有清晰的操作步骤、是否补充了同类页面缺失的信息。
结构化数据是内容质量表达的辅助工具。FAQPage等结构化标记仍可正常使用,只是自2023年起,Google仅对权威政府、健康类站点展示FAQ富结果,其他站点的标记不会直接带来搜索结果页的可见增强,但仍可能被AI搜索引擎作为内容提取的信号使用[2]。判断相关服务价值时,应区分富结果展示与AI引用两种不同作用。
内容可用性的技术与体验维度
内容可用性关注的是用户能否顺畅访问和阅读页面,Google公开的相关要素包括Core Web Vitals核心网页指标、HTTPS安全协议、弹窗干扰程度、移动设备友好度等[1]。这些因素既影响用户体验,也会被搜索引擎纳入排名评估。
Core Web Vitals是可用性中最常被提及的部分,涵盖加载速度、交互响应、视觉稳定性三个核心指标。采购技术SEO服务时,可核对服务商是否会提供具体的指标检测结果、指出影响指标的页面元素,并给出可执行的优化建议,而不是只笼统承诺提升速度。
移动友好度与HTTPS属于基础可用性配置。目前大多数站点已支持HTTPS与移动端适配,但仍需注意弹窗布局、字体大小、按钮间距等细节是否会影响移动用户的阅读与操作。服务商在做站点基础诊断时,通常会将这些项目纳入检查范围。
在AI搜索逐渐普及的背景下,内容可用性的边界也在扩展。Bing官方针对其AI搜索功能给出的建议包括使用清晰的结构化内容、语义化HTML、结构化数据以及遵循无障碍最佳实践[2]。由于Bing的AI能力同时支持Microsoft Copilot与ChatGPT搜索,优化这些维度不仅适用于传统搜索,也有助于提升在AI场景中的被引用概率。
索引与抓取是可用性的前置条件。IndexNow协议可让站点向多个搜索引擎推送即时索引通知,2026年参与该协议的搜索引擎包括Bing、Yandex、Naver等,Google尚未参与,仍主要通过站点地图与常规抓取流程发现内容[2]。如果服务商提供快速索引服务,可核对其适用的搜索引擎范围,避免默认覆盖所有平台。
三项内容在服务采购中的核对方法
理解搜索引擎优化的三项核心内容后,采购服务时可按对应维度拆分需求,而不是只看“SEO优化”这一总名称。内容相关性服务主要包括关键词研究、页面主题规划、标题与正文结构优化;内容质量服务主要包括内容策略、E-E-A-T强化、结构化数据配置;内容可用性服务主要包括技术诊断、Core Web Vitals优化、移动适配与索引配置。
不同服务商的业务侧重会有差异。有的服务商以内容策略与创作为主,有的侧重技术优化,也有的提供全案服务。核对方案时,可要求服务商明确每一项工作对应的是三项内容中的哪一部分,以及交付物是什么,例如关键词清单、页面优化建议表、技术检测报告等。
关于AI搜索时代的优化方向,Google官方明确表示没有单独的“AI优化”要求,标准的SEO最佳实践仍然适用,网站主也可以通过robots.txt中的Google-Extended指令控制内容是否被用于AI训练[2]。因此,如果服务商提出专门的AI SEO套餐,可进一步说明其与标准SEO的差异,避免为重复内容付费。
需要补充的是,三项内容之间存在关联。例如,清晰的页面结构既有助于提升相关性表达,也能改善用户阅读体验,间接影响可用性指标。因此在评估服务方案时,不必把三项内容完全割裂,而是看整体方案是否覆盖了主要维度,且每一项动作都有明确的公开依据支撑。
参考来源
- Get Started with Search Engine Optimization (SEO) | Adobe Experience Cloud - Experience League
- # Official SEO Guidelines Cheatsheet (Google Search Central, Bing, Schema.org, MDN) **Last updated:** 2026-05-03 **Source:** https://www.lawrencehitches.com/seo-official-guidelines-cheatsheet/ --- Distilled from Google Search Essentials and the Quality guidelines.Download PNGtrong>This is a quick-reference cheatsheet to the official SEO guidelines that matter most in 2026: Google Search Central, Bing Webmaster, Schema.org, MDN's robots.txt spec, and IndexNow. Each entry summarises what the official documentation says, what it actually means in practice, and links to the source. I built this because the official docs are scattered across half a dozen sites and dozens of pages. When you're trying to confirm a single rule (e.g. "does Google still support FAQ schema on non-FAQ pages?") it's faster to scan one page than to hunt through five. ## Google Search Central, The Core Pages You Should Bookmark ### Title Link Best Practices Google's official guidance on writing title elements (the source for what becomes the title link in search results). Keep titles unique, descriptive, and concise. Google may rewrite your title link if it finds a better match for the query, typical rewrite rate is 40-60% across the web. **In practice:** write titles 50-60 characters, lead with the primary keyword, include brand at the end on supporting pages but at the start on commercial money pages. [developers.google.com/search/docs/appearance/title-link](https://developers.google.com/search/docs/appearance/title-link) ### Heading Tags (SEO Starter Guide) Use heading tags to signal structure. The starter guide doesn't say "you must have one H1" but it does say to use headings to convey structure and meaning. Skipping heading levels is allowed but discouraged. Heading text matters more than the level number for ranking signal. **In practice:** one H1 per page (covered in our [header tags guide](https://www.lawrencehitches.com/header-tags/)), H2s for main sections, H3s only when an H2 has multiple subsections. [developers.google.com/search/docs/fundamentals/seo-starter-guide](https://developers.google.com/search/docs/fundamentals/seo-starter-guide) ### Qualify Outbound Links: Sponsored, UGC, Nofollow Three link attributes to declare relationships: - `rel="sponsored"` , paid, affiliate, advertising links - `rel="ugc"` , user-generated content (comments, forum posts) - `rel="nofollow"` , generic "don't pass equity"; still the default if you can't be more specific **In practice:** always disclose paid links with `sponsored`. Default to `nofollow` for generic untrusted links. Use `ugc` on comment sections. [developers.google.com/search/docs/essentials/spam-policies](https://developers.google.com/search/docs/essentials/spam-policies#qualify-outbound-links) ### Structured Data: FAQPage Guidelines FAQPage schema is supported but with restrictions since 2023: Google only displays FAQ rich results from "well-known authoritative" government and health sites. Other sites can still mark up FAQs (and AI search engines like Perplexity and ChatGPT use the schema as an extraction signal), but the visible SERP enhancement is gone for most domains. **In practice:** still ship FAQPage schema. The SERP rich result is gone for most sites, but AI engines parse it. We auto-generate it on every [article on this site](https://www.lawrencehitches.com/articles/). [developers.google.com/search/docs/appearance/structured-data/faqpage](https://developers.google.com/search/docs/appearance/structured-data/faqpage) ### Helpful, Reliable, People-First Content (incl. YMYL) Google's content quality framework. The "Your Money or Your Life" (YMYL) categories, finance, health, safety, legal, are held to higher E-E-A-T standards. The 2022 Helpful Content Update made content quality a sitewide signal: a domain with a lot of unhelpful content gets demoted across the board. **In practice:** for YMYL topics, name the author (with credentials), cite sources, show direct experience. For everything else, write content that genuinely helps a human reader more than the next-best-ranking competitor. [developers.google.com/search/docs/fundamentals/creating-helpful-content](https://developers.google.com/search/docs/fundamentals/creating-helpful-content) ### AI Features and Your Website Google's documentation on how AI Overviews and Search Generative Experience use content. Standard SEO best practices apply, there's no separate "AI optimisation" requirement. Google does provide opt-out controls via `Google-Extended` in robots.txt for excluding content from training (covered in our [robots.txt guide](https://www.lawrencehitches.com/robotstxt/)). [developers.google.com/search/docs/appearance/ai-features](https://developers.google.com/search/docs/appearance/ai-features) ## Google Business Profile, Local SEO Documentation ### Business Description: 750 Character Limit The "from the business" section in Google Business Profile is capped at 750 characters. Google's official guidelines say: don't use it for promotional content, sales, or links. Use it to describe what the business does and what makes it distinct. **In practice:** first 250 characters carry the most weight (visible without "read more"). Lead with what you do + city + the differentiator that matters most. [support.google.com/business/answer/7091](https://support.google.com/business/answer/7091?hl=en) ## Bing Webmaster Guidelines, Often Forgotten, Worth Reading ### Bing Webmaster Guidelines for AI Search Bing officially documents how its AI search (powering Microsoft Copilot, ChatGPT search, and the broader OpenAI ecosystem) uses website content. Bing recommends: clear, well-structured content; semantic HTML; structured data; and accessibility best practices. Bing also officially supports IndexNow for instant indexing. **In practice:** Bing has been undervalued by SEOs for a decade, but in 2026 it powers ChatGPT search, Copilot, and an increasing share of AI-mediated queries. Worth optimising for. See our [Google vs Bing guide](https://www.lawrencehitches.com/google-vs-bing/) for the case. [bing.com/webmasters/help/webmasters-guidelines](https://www.bing.com/webmasters/help/webmasters-guidelines-30fba23a) ## Schema.org, The Structured Data Reference ### Schema.org Type Library Schema.org is the canonical reference for structured data types. The hierarchy starts at `Thing` and branches into hundreds of specialised types: `Article`, `Product`, `LocalBusiness`, `Person`, `Organization`, `Event`, etc. **Specialised LocalBusiness sub-types worth knowing** (Google supports them all): - `Restaurant` , for restaurants, cafes, bars - `MedicalBusiness` , for clinics, doctors, hospitals - `HealthAndBeautyBusiness` , for spas, salons, beauty clinics - `AutomotiveBusiness` , for dealerships, mechanics - `LegalService` , for law firms - `FinancialService` , for accountants, financial advisors **In practice:** use the most specific type that applies. `HealthAndBeautyBusiness` beats generic `LocalBusiness` for a salon, Google reads it as a stronger entity signal. [schema.org/docs/full.html](https://schema.org/docs/full.html) ### Structured Data Testing The official validators: - [Google Rich Results Test](https://search.google.com/test/rich-results) , checks if your schema qualifies for SERP enhancements - [Schema.org Validator](https://validator.schema.org/) , generic syntax + spec validation ## Robots.txt, MDN and the Robots Exclusion Standard ### MDN Robots.txt Documentation Mozilla Developer Network's robots.txt page covers the core spec: `User-agent`, `Disallow`, `Allow`, `Crawl-delay` (Google ignores this), `Sitemap`. The 2022 RFC 9309 formalised the de-facto standard most major search engines have followed for two decades. **In practice:** our [robots.txt guide](https://www.lawrencehitches.com/robotstxt/) covers the 2026 reality including AI crawler controls (GPTBot, ClaudeBot, PerplexityBot, etc.) which aren't in the original spec but are now de-facto standard. [developer.mozilla.org/en-US/docs/Glossary/Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) ## IndexNow, Faster Indexing Across Search Engines ### IndexNow Participating Search Engines (2026) IndexNow is an open protocol that lets sites push instant indexing pings to multiple search engines at once. As of 2026, the participating engines are: - **Bing** (Microsoft), original co-founder of the protocol - **Yandex** , co-founder; matters for sites targeting Russian-language audiences - **Naver** , Korea's dominant search engine; added 2023 - **Seznam** , Czech Republic; added 2022 - **Yep** , privacy-focused search; added 2023 - **DuckDuckGo** , partial integration via Bing's index **Notably absent:** Google still doesn't participate. Google's ecosystem uses its own Indexing API (limited to JobPosting and BroadcastEvent schema) and the standard sitemap + crawl flow. **In practice:** IndexNow integration is cheap (one HTTP POST per URL change) and gets your content into Bing, and through Bing, ChatGPT search and Copilot, in minutes instead of days. Worth wiring up if your site has frequently-updated content. [indexnow.org/searchengines](https://www.indexnow.org/searchengines) ## Google's Documentation Quirks That Catch People Out A few things the official docs say that contradict common SEO advice: - **Meta keywords aren't used.** Confirmed by Google in 2009 and reaffirmed every couple of years. Stop adding them. - **Word count isn't a ranking factor.** Long content can rank because it covers more relevant subtopics, not because of length itself. - **The disavow tool is rarely needed.** Google's own docs since 2020 explicitly say most webmasters shouldn't need it. Use only if you have a manual action. - **Multiple H1s are technically allowed in HTML5.** The starter guide doesn't say "only one H1", that's SEO folklore. (Practitioner advice: still use one. [More on this](https://www.lawrencehitches.com/header-tags/) .) - **JavaScript-rendered content gets indexed.** Google renders JS; the older "JS = invisible to Google" advice is wrong as of 2018. There are still performance and discoverability trade-offs, but indexability isn't one of them. ## How to Use This Cheatsheet Three workflows: 1. **Quick fact-check.** Want to confirm what the official docs say about a specific topic? Use this page as a jump-off to the source. 2. **Stakeholder evidence.** When a client (or boss) pushes back on SEO advice, link them to the official source. Authority by reference. 3. **AI search context.** AI engines (ChatGPT, Perplexity, Claude) cite official documentation heavily. Building a clean reference page like this gets cited because it consolidates information across multiple authoritative sources. Part of [the complete cheatsheet library](https://www.lawrencehitches.com/cheatsheets/). ## FAQ: Official SEO Guidelines ### Where can I find Google's official SEO guidelines? Google's main hub is [Google Search Central](https://developers.google.com/search) (developers.google.com/search). The most-referenced pages are the SEO Starter Guide, the Search Essentials, the Spam Policies, and the structured data documentation. ### Does Bing have an equivalent to Google Search Central? Yes, [Bing Webmaster Guidelines](https://www.bing.com/webmasters/help/webmasters-guidelines-30fba23a). Less polished than Google's documentation, but worth reading because Bing now powers ChatGPT search, Copilot, and a growing share of AI-mediated traffic. ### Are Google Search Central guidelines requirements or recommendations? Mostly recommendations. The Spam Policies are enforceable rules (violations can trigger manual actions). The other documentation is best-practice guidance, sites can rank without following every recommendation, but following them increases the probability of strong organic performance. ### Does Google really not use meta keywords? Correct, Google has not used the meta keywords tag for ranking since 2009. [Officially confirmed](https://developers.google.com/search/blog/2009/09/google-does-not-use-keywords-meta-tag) and reaffirmed multiple times since. Bing and other engines also ignore it. Stop adding meta keywords to your pages. ### What's the difference between rel="nofollow", rel="sponsored", and rel="ugc"? All three are link attributes that tell search engines not to pass full ranking equity. `rel="sponsored"` declares paid or affiliate relationships. `rel="ugc"` identifies user-generated content. `rel="nofollow"` is the generic catch-all. Google introduced the more specific tags in 2019 to encourage better classification, they all function similarly but provide more accurate signal. ### Is FAQPage schema still worth using? Yes, but for different reasons than in 2021. Google restricted FAQ rich results to government and health authority sites in 2023, most sites no longer get the visible SERP enhancement. However, AI search engines (ChatGPT, Perplexity, Claude, Google AI Overviews) parse FAQPage schema as a strong extraction signal. Mark up FAQs to feed AI citations, not for the SERP rich snippet. ### Which search engines participate in IndexNow? As of 2026: Bing, Yandex, Naver, Seznam, Yep, and (partially) DuckDuckGo. Google does not participate, they use their own Indexing API for limited content types and standard crawl for everything else. Implementing IndexNow gets your content into Bing's index (and through Bing, into ChatGPT search and Copilot) in minutes instead of days. ## Sources & Further Reading - [Google Search Central (full hub)](https://developers.google.com/search) - [Bing Webmaster Guidelines](https://www.bing.com/webmasters/help/webmasters-guidelines-30fba23a) - [Schema.org](https://schema.org/) - [IndexNow Protocol](https://www.indexnow.org/) - [MDN: Robots.txt](https://developer.mozilla.org/en-US/docs/Glossary/Robots.txt) ## Keep Reading - [Header Tags: SEO Best Practices for H1-H6](https://www.lawrencehitches.com/header-tags/) - [Robots.txt in 2026: AI Crawlers + Configuration](https://www.lawrencehitches.com/robotstxt/) - [Google vs Bing in 2026](https://www.lawrencehitches.com/google-vs-bing/) - [AI Citation Mechanics](https://www.lawrencehitches.com/ai-citation-mechanics/) Bookmark this SEO guidelines go-to reference: keep it handy for your next audit. --- *Lawrence Hitches is an independent AI SEO Consultant and General Manager at StudioHawk, Australia's most awarded SEO agency. Free 30-minute AI search consultation: https://www.lawrencehitches.com/ai-seo-consultant/* - Lawrence Hitches