Technical SEO

Rendering Budget

Quick Definition

Rendering budget is the practical limit on how much JavaScript-heavy content Google's renderer (Web Rendering Service, based on Chromium) can execute and index per page within a reasonable time.

In context

Even though Google renders JavaScript, doing so is expensive and rate-limited. Pages that depend on heavy client-side execution to expose primary content are at risk of having that content missed during the second-pass render. The mitigation: server-side render or static-generate any content that must be indexed, hydrate progressively, and avoid blocking the initial paint on third-party scripts. Test in Search Console URL Inspection 'View Tested Page' — if your primary content is missing, you have a rendering-budget problem.

Example

A Toronto B2B SaaS moved from full client-side React to Next.js with SSR for marketing pages — Search Console immediately stopped reporting 'crawled but not indexed' on the previously affected URLs.

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Related terms

JSON-LD

JSON-LD (JavaScript Object Notation for Linked Data) is the format Google recommends for adding structured data to web pages.

Crawl Depth

Crawl depth is the number of clicks from your homepage to a given page. Pages deeper than 3 clicks tend to be crawled less often and rank less well.

302 Redirect

A 302 redirect is a temporary redirect that tells search engines the move is not permanent.

Indexation

Indexation is the state of a page being included in Google's (or another engine's) searchable index — distinct from being crawled, which only means the page was fetched.

Sitemap

A sitemap is a file that lists URLs on a site so search engines can discover and prioritise crawling. The most common format is XML; HTML sitemaps exist for human navigation.

Sitemap Priorities & Lastmod

Priority and lastmod are optional XML sitemap fields — priority (0.0–1.0) signals relative importance among URLs on the same site; lastmod is the last modification date.

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