Google’s web-indexing infrastructure introduced in 2010 to process and update the search index more continuously.
Caffeine concerns how information enters and updates the index. It is distinct from the ranking decision that orders results for a query. Faster processing infrastructure does not mean every newly published page is immediately indexed or prominently ranked.
Google’s announcement contrasted incremental processing with the older layered refresh approach. That history helps explain why search can reflect changing information without waiting for one large index rebuild, but it is not a service-level promise to an individual website.
For a publisher, useful work still includes making important pages discoverable, accessible and worth indexing. Repeatedly submitting an unchanged URL or changing its date without a meaningful update does not establish that the page deserves different treatment.
Takeaway: Make substantive updates easy to discover, but distinguish publication time, crawl time, indexing and ranking in your reporting.
Example
A company publishes a new service guide and adds a relevant internal link. It checks later crawl and indexing evidence rather than promising the owner that Caffeine guarantees immediate search traffic.
What to check
Use Search Console and server evidence to investigate delays. Avoid interpreting an old infrastructure announcement as a current indexing deadline.
For more detail, see Google Caffeine announcement.