Currently, Chrome uses a "suggestion" algorithm. If you visit a site frequently, it appears. The mostvisited9 update hints at a more robust ranking system. By refining how the 9th slot is calculated, Google is likely improving the "recency vs. frequency" algorithm—ensuring that the site you visited yesterday doesn't get bumped by a site you visit every month.
If you are unhappy with the "updated" look of your most visited sites, use these steps to revert or manage them: How to Enable Most Visited Sites Shortcut On Google Chrome chrome newtab mostvisited9 updated
If an undesirable page finds its way onto your primary grid, you do not need to reset the entire database. Simply hover over that specific shortcut icon on your desktop New Tab Page and click the button to permanently drop it from your automated rankings. On mobile devices, press and hold the icon tile to reveal the delete action. Android google chrome tile based tabs with groups Currently, Chrome uses a "suggestion" algorithm
Because features like mostvisited9 rely on constant background updates, glitches can occasionally cause shortcuts to freeze, disappear, or display incorrect thumbnails. Here is how to fix them. Missing or Reset Shortcuts By refining how the 9th slot is calculated,
This is not a flag you need to enable in chrome://flags for most users; it has been gradually enabled via Google’s backend. The term "mostvisited9" has become an internal shorthand in Chromium discussions, representing the new default shortcut capacity.