We've covered the topic of Google remembering stuff for a long long time - yes, they keep an archive of what has changes, when it has changed with virtually every URL on the web. The algorithms do look at history but they don't all make judgements based on that history.
At the 16:35 mark into the Friday hangout, John Mueller pointed out that fact, again:
And the various algorithms that we have they do try to be fast and responding to what's what's out there on the web. But some of them are fast, some of them are a bit slower, some of them like to take into account more of the history of what what has been changing their.
Here is the video embed at the start time:
Jennifer Slegg covered it and then asked John Mueller which signals does this apply to. John Mueller responded on Twitter that virtually all of them of them do. He said "they pretty much all do."
Here is the tweet:
@jenstar They pretty much all do.. Eg, if we find a link to a URL, it's based on the site as it was back then. Some things collect over time
— John Mueller (@JohnMu) October 7, 2016
Google has some pretty good memory - don't forget that. :)
Forum discussion at Twitter.
