Freshness signals that make LLMs trust and re-cite your pages
Answer engines favor content they believe is current. Here are the freshness signals that matter to LLMs — and how to send them without faking updates.
Answer engines are cautious about recommending information that might be out of date, because a wrong, stale answer is worse than no answer. That makes freshness a genuine ranking and citation factor in AI search — not because new is always better, but because engines treat recency as evidence that someone still stands behind the page.
Send the signal in three places
- Visible dates: show published and updated dates in the page body, near the title.
- Structured data: set datePublished and dateModified in your Article or BlogPosting JSON-LD.
- HTTP headers: return an accurate Last-Modified header and correct sitemap lastmod.
When these agree, the signal is strong and credible. When they contradict each other — a 2023 body date but a today dateModified — engines discount all of them.
Update substance, not just dates
The lazy move is bumping the dateModified with no real change. It is also increasingly detectable: crawlers diff content over time. Real freshness means revisiting claims, refreshing examples and statistics, and removing anything that has aged badly. A genuine update earns a recrawl and a re-evaluation; a cosmetic one risks a trust penalty.
Where freshness matters most
- Fast-moving topics: pricing, model versions, platform features, regulations.
- High-intent commercial pages that directly drive revenue.
- Cornerstone guides you want cited repeatedly across a prompt set.
- Anything with a year in the title — keep it current or drop the year.
Then tell the engine
A refresh only helps once the engine notices. After a substantive update, push the URL via IndexNow so Bing recrawls promptly, and make sure the change is reflected in your sitemap's lastmod. Freshness plus fast delivery is what turns an update into a re-citation.
Frequently asked questions
- How often should I update cornerstone content?
- Whenever the underlying facts change, and at minimum on a quarterly review cadence for high-value pages. Frequency matters less than honesty.
- Does changing the date alone help?
- No — and it can hurt. Engines increasingly compare content over time and discount pages whose dates move without substance.
- Should every page show an updated date?
- Show it where it is true and useful, especially on guides and commercial pages. Do not fabricate updates to display a recent date.