A significant update is a substantive change to the content’s value, and a cosmetic one is everything Google tends to ignore. New information, reworked sections, updated data and statistics, corrected or expanded answers, and genuinely improved coverage all change what the page is worth to a reader, and that is what can earn renewed attention. Changing the date, tweaking a sentence, swapping a few synonyms, or other surface edits do not change the value, so they do not register as a meaningful refresh. The pivot is changes-the-content’s-value versus cosmetic.

The reason the line falls there is that Google evaluates pages on how well they satisfy the query, not on edit timestamps. When an update adds information the searcher needs, deepens coverage a competitor was beating you on, or corrects outdated facts, it can genuinely improve how well the page answers the query, and that improvement is what a refresh can be rewarded for. The change has to move the page’s actual usefulness; the modification date moving on its own is not evidence that anything got better.

The tactic this rules out is the most common one: changing a handful of words and bumping the published date to look fresh. That manipulates the appearance of an update without doing the work of one, and because the content’s value has not moved, there is nothing for Google to reward and the gesture tends to be ignored. This is an area worth treating as observed behavior to verify against current guidance, since exactly how Google weighs freshness shifts by query and over time, but the underlying logic, value over cosmetics, has held steady.

Make value-changing updates rather than cosmetic ones. When you refresh a page, add genuinely new or corrected information, rework sections that have fallen behind, update the data, and improve coverage where the answer was thin, then let the modified date reflect real work rather than driving it. Judge each update by whether the page is meaningfully more useful afterward, because that is the change that can actually count.