Digital MarketingSEO & AI Search
Google Says Serve 304s to Stop Wasting Crawl Budget
Google's updated crawl budget documentation now recommends serving a 304 Not Modified response for unchanged pages, and it confirms that all Google crawlers draw from one shared capacity limit per site.
Key takeaways
- Google updated its Optimize Your Crawl Budget documentation on Aug. 3, 2026, adding a recommendation to support 304 Not Modified responses.
- A 304 tells Googlebot to reuse its cached version of a page instead of re-downloading it, saving server bandwidth and crawl resources.
- Google confirmed that crawl capacity is shared across all its crawlers (Googlebot, Googlebot-Image, etc.), so heavy demand from one can crowd out others.
- The guidance targets enterprise sites over 1 million pages and mid-size sites over 10,000 rapidly changing pages, per Google's documentation.
- No specific ranking benefit is claimed; the fix is about server efficiency and indexing freshness, not rankings directly.
What Google Changed
Google quietly rewrote a chunk of its crawl budget documentation this week, and the headline addition is blunt: start returning 304 Not Modified status codes for pages that haven't changed since Googlebot last visited. As Roger Montti reported for Search Engine Journal on Aug. 3, 2026, the update lives inside Google's Optimize Your Crawl Budget documentation, aimed at enterprise sites over 1 million pages and mid-size sites over 10,000 pages that change frequently.
The mechanism is simple. Google's own language: "If a page hasn't changed since Google last crawled it, returning a 304 code tells Google to reuse the cached version, saving your server bandwidth and resources." No redirect happens, despite 304 technically sitting in the 3xx family. Googlebot just pulls what it already has and moves on.
HTTP status code Google now recommends for unchanged pages
Google Search Central, via Search Engine Journal, Aug. 3, 2026
The Shared Capacity Detail Marketers Are Missing
The second addition matters more for anyone running a large content operation. Google added this line to its documentation: "While each crawler has a different crawl demand, the crawl capacity limit is shared across all crawlers. This means that high demand from one crawler can reduce the capacity available for others." Translation: Googlebot-Image, Googlebot, and every other Google crawler are pulling from the same pool at your site. If your image bot is getting hammered, your main content crawl pays for it.
For large publishers and ecommerce catalogs, this pairs with other crawl-behavior quirks worth tracking, including cases where Google may ignore robots.txt rules due to file errors that confuse the crawler about what's actually changed or blocked.
A 304 code tells Google to reuse the cached version, saving your server bandwidth and resources.Google Search Central documentation, via Search Engine Journal
What To Do This Week
None of this changes rankings directly. It's about server efficiency and making sure Googlebot's limited visits go toward pages that actually changed. If you run a site with rapid content churn, this is worth pairing with a proper log-file audit; tools like
SiteProfiler can help surface crawl and indexing patterns alongside your own server logs.
Visit CMO Mag's Digital Marketing hub for more crawl and indexing coverage.
Frequently asked questions
It tells Googlebot to reuse the cached version of a page instead of re-downloading it, which Google says saves server bandwidth and crawl resources rather than directly affecting rankings.
Google's documentation targets enterprise sites with over 1 million pages and medium-sized sites with over 10,000 pages that change frequently, according to Search Engine Journal.
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