Technical SEO and Indexing Guide for Startups

Treat llms.txt as optional

llms.txt is a community proposal, not a Google Search requirement or documented AI inclusion control. Adoption varies by service. If you publish one, keep it accurate and maintain it as optional documentation rather than prioritizing it over accessible, useful pages.

Publish clear, useful information

Use accurate product descriptions, clear authorship where relevant, and primary sources for factual claims. These are good publishing practices, but there is no proven checklist that guarantees citation or recommendation by an AI service.

Choose crawler access deliberately

Some services identify crawlers for search retrieval, while others identify crawlers used for model training. Review each provider's published documentation and your own policy before allowing or blocking a crawler. Google-Extended controls certain Gemini and Vertex AI uses; it does not control Google Search crawling or determine inclusion in Search or AI Overviews.

Do not confuse access with inclusion

Allowing a crawler in robots.txt permits access under that crawler's rules; it does not ensure a service will use, index, train on, cite, or recommend your content. Robots directives are voluntary and are not a substitute for authentication or other access controls.

Hub-and-Spoke Architecture

Organize your content into topical hubs with a main pillar page (hub) and a cluster of supporting articles (spokes). The pillar page targets a broad, high-competition keyword. Each spoke targets a specific long-tail variant and links back to the hub. This architecture concentrates topical authority on your pillar pages and makes your site structure clear to both human readers and crawlers.

Link From High-Traffic Pages to High-Value Pages

Your highest-traffic blog posts and landing pages should contain deliberate internal links to your product pages, pricing, signup, and other high-conversion destinations. A new user landing on your statistics post via organic search is a valuable prospect — make sure there is a clear, contextually relevant link to your product from within that content.

Make important pages discoverable

Link to useful pages from relevant navigation, category pages, or related content. Avoid orphan pages, but do not target an arbitrary number of links; prioritize clear paths for users and crawlable links.

Use descriptive anchor text

Write concise link text that describes the destination in context. Avoid repetitive keyword-stuffed anchors and generic text when a clearer phrase helps readers understand where a link goes.

Crawlability Foundation

• !XML sitemap lists preferred, canonical URLs and is submitted or monitored in Google Search ConsoleCritical
• !Sitemap stays within protocol limits and excludes redirects, noindex pages, and non-canonical variantsCritical
• !robots.txt allows Googlebot and does not accidentally block core site sectionsCritical
• ✓Review each AI crawler's published purpose and choose access rules deliberately; allowing a crawler does not guarantee citations
• !All canonical tags point to the correct preferred URL (not a redirect destination)Critical
• !No noindex directives on pages you want indexed (check HTTP headers too, not just meta tags)Critical

Structured Data Implementation

• ✓Use Organization, WebSite, Product, or SoftwareApplication markup only when it accurately describes visible content
• ✓Structured data matches visible content and a currently supported search feature where applicable
• ✓Article schema on all blog posts with valid datePublished and author fields
• ✓Add BreadcrumbList where it accurately represents the page hierarchy
• !Validate all schema at schema.org/SchemaValidator before publishingCritical

Core Web Vitals

• ✓Review LCP, INP, and CLS field data; prioritize issues affecting real visitors
• ✓Fonts preloaded (<link rel=preload>) to prevent layout shift during font swap
• ✓Images converted to WebP/AVIF with explicit dimensions in all img tags

AI Indexing (LLM Optimization)

• ✓If using llms.txt, treat it as optional documentation, not an indexing or AI inclusion control
• ✓Clearly identify authors and cite primary sources where relevant to readers
• ✓Make important pages reachable through descriptive internal links; there is no universal link-count threshold

International & Technical Hygiene

• ✓Investigate unexpected crawl errors in the current Page indexing report
• ✓Redirect changed URLs when a relevant replacement exists; allow intentional removals to return 404 or 410
• !HTTPS enforced with valid SSL certificate; no mixed-content warningsCritical
• ✓Page loads correctly with JavaScript disabled (important for initial crawlability)
• ✓Open Graph and Twitter meta tags on all shareable pages for social CTR optimization

How do I know if my pages are being indexed by Google?

Use Google Search Console's URL Inspection tool for an individual URL's known indexing status, Google's selected canonical, and the last crawl information available. The Page indexing report helps investigate patterns across URLs. URL Inspection does not report Core Web Vitals or validate all structured data; use the relevant Search Console reports and Rich Results Test for those checks. A site: query is only a rough diagnostic, not a complete index count. Google decides whether a discovered and crawlable URL is indexed.

What is the difference between crawling and indexing?

Crawling is when a crawler discovers and fetches a URL; indexing is Google's separate decision to store and potentially show a page in Search. A page may be crawled but not indexed, for example because it is a duplicate or Google does not consider it useful enough. A robots.txt disallow prevents Google from crawling that URL, but does not reliably prevent the URL from appearing in search results. If a page must be excluded, allow crawling so Google can see a noindex directive, or protect it with authentication. Neither crawling nor indexing guarantees rankings.

What structured data types matter most for startups?

Use structured data only when it accurately describes visible page content and meets the relevant feature's rules. Organization, Article, Product, and BreadcrumbList markup can help machines interpret page details, but markup does not guarantee a rich result or ranking benefit. Review Google's current Search Gallery for supported Search features before implementation. FAQ rich results are generally limited to well-known government and health sites, HowTo rich results have been retired, and WebSite SearchAction no longer produces a Sitelinks Search Box. JSON-LD is a supported format, not a shortcut to eligibility.

How does robots.txt work, and what mistakes should I avoid?

Robots.txt gives compliant crawlers instructions about which URLs they may fetch; it is not access control and cannot guarantee a URL stays out of search results. Avoid accidentally disallowing important content or resources needed to render it. If a public page should be excluded from Google, do not block it in robots.txt: let Google crawl a noindex directive, or require authentication for private content. A blocked URL can still be indexed without a description, and link discovery or ranking effects are not reliably controlled by robots.txt.

What is llms.txt and why should I add it?

llms.txt is a community proposal for a Markdown summary intended for language-model use. It is not a Google Search requirement or a documented way to get included in AI answers, and adoption by AI services varies. Treat it as optional documentation; do not prioritize it over accessible, useful pages, ordinary crawl controls, and clear sourcing, and do not promise that it improves citation or recommendation chances.

How important are Core Web Vitals for search rankings?

Google uses Core Web Vitals as part of its page-experience signals, alongside many other ranking systems; good scores do not guarantee better rankings. The current 'good' field thresholds are LCP ≤ 2.5 seconds, INP ≤ 200 milliseconds, and CLS ≤ 0.1, assessed at the 75th percentile. Measure real-user field data and improve issues that affect actual visitors. Do not treat bounce rate as a Google ranking metric or assume one performance score determines search visibility.

How should I handle URL parameters for large product databases?

Parameters can create many URL variants, so keep internal links and sitemaps consistent and use a canonical only when a URL is a duplicate or alternate of the preferred page. A parameterized category page may be a valid indexable landing page if it has distinct value and a self-referencing canonical. Google's legacy URL Parameters tool is retired; it cannot be used to control crawling. Avoid blocking URLs that Google needs to crawl to see a canonical or noindex signal, and prioritize crawl-budget work only when site size and crawl activity make it relevant.