If you update a page, how long will it take until Google indexes it and displays it in the search results?
it usually depends on how much online presence your website have like how many backlinks are available/
It depends on the overall status of your website on the internet and how Google observes your website. For instance, some blogs posts are indexed and visible within a couple of minutes while some pages may not be noticed on the net after some weeks.
I have a brand new page and it happens in one or two weeks.Last time it happen in 4 days so just build backlinks and it will get faster.