For a long time I assumed that google indexed pretty much everything it, and it was only a question of providing a specific enough set of search terms to drag up older content.
But what you hint at might be more correct these days. They are running a reverse wayback machine in that anything not changed in the last year gets removed. If you click the advanced search its "updated within" and the max timeframe is a year.
But what you hint at might be more correct these days. They are running a reverse wayback machine in that anything not changed in the last year gets removed. If you click the advanced search its "updated within" and the max timeframe is a year.
In fact it seems the date range example doesn't even work: https://developers.google.com/custom-search/docs/structured_...
If I fiddle with it, it returns a result, but I see an hit from just a few days ago at the top...