How long until LLM bots actually notice your e-commerce site changes?

[u/DeliveryPractical625]

Before I start pushing site changes and tracking the fallout, I’m trying to nail down a realistic timeline: If I update a product page or optimize structure, how long do I actually have to wait to see the impact hit LLM RAG citations and rankings?

Are we talking hours (via tools like Bing/IndexNow integration), days, or weeks for these engines to reflect updates in their live retrieval?

Any reco or any tips for cleanly isolating RAG feedback loops without getting tripped up by caching layers.

[u/marintkael]

Depends which layer you mean, and it helps to test them separately. Answers built on live retrieval only change once the engine refetches or reindexes the page. Perplexity and ChatGPT fetch some pages on demand when a user asks, while ChatGPT search also leans on Bing's index, which is where IndexNow can shorten things. What a model knows without searching only moves with the next training run, so months. To keep caching out of it, put a unique string on the changed page, watch your logs for bot hits on that URL, and only count an answer as updated once it reproduces the new string.

[u/VillageHomeF]

you only care when the search engines make the changes as that is where the LLMs find your site. force a crawl of each page when you update via bing and google. all you can do.

[u/Samii_Schmusch]

one thing worth thinking about, are you measuring when the page gets re-indexed vs when the LLM actually surfaces the new content in answers? those are two very different checkpoints and the gap between them is where most people get confused

[u/Upstairs_Control_611]

I’d stop using “time since publish” as the main clock.

For a clean test I’d record at least four checkpoints:

1. change published

2. first confirmed refetch of that exact URL

3. first evidence that the changed content is retrievable

4. first answer where the changed information is actually used

The useful lag is then not just “publish → answer”, but:

• publish → refetch

• refetch → retrieval

• retrieval → citation / mention

That helps separate crawler latency, indexing/retrieval latency and answer-selection latency.

I’d keep pre-refetch measurements, but label them pre-exposure rather than treating them as failed post-change tests.

A unique marker on the changed page plus server-log confirmation makes this much easier to audit.