Included Snippets Drop
On February 19, MozCast measured a dramatic drop (40% day-over-day) in SERPs with Featured Bits, with no immediate indications of healing. Here's a two-week view (February 10-23):.
Are we losing our minds?
After the year we have actually all had, it's always great to check our peace of mind. In this case, other data sets revealed a drop on the very same date, however the seriousness of the drop varied significantly. I examined our STAT information across desktop questions (en-US just)-- over 2 million everyday SERPs-- and saw the following:.
While mobile SERPs in STAT showed higher overall frequency, the pattern was extremely comparable, with a 9% day-over-day-drop on February 19 and an overall drop of about 12% since February 10. Note that, while there is substantial overlap, the desktop and mobile information sets may include various search expressions. While the desktop information set is currently about 2.2 M day-to-day SERPs, mobile is closer to 1.7 M.
Note that the MozCast 10K keywords are manipulated (intentionally) toward much shorter, more competitive phrases, whereas STAT includes a lot more "long-tail" expressions. This discusses the overall greater occurrence in STAT, as longer expressions tend to consist of concerns and other natural-language questions that are more likely to drive Featured Snippets.
Why the huge distinction?

Competitive health care terms lost more than two-thirds of their Featured Snippets. It ends up that many of these terms had other popular features, such as Medical Understanding Panels. Here are some high-volume terms that lost Included Snippets in the Health classification:.
diabetes.
lupus.
autism.fibromyalgia.
acne.While Finance had a much lower initial frequency of Included Bits, Financing SERPs also saw enormous losses on February 19. Some high-volume examples include:.
pension.
danger management.mutual funds.
roth ira.financial investment.
Like the Health classification, these terms have a Knowledge Panel in the right-hand column on desktop, with some standard details (mainly from Wikipedia/Wikidata). Once again, these are competitive "head" terms, where Google was displaying multiple SERP features prior to February 19.Both Health and Financing search phrases line up carefully with so-called YMYL (Your Money or Your Life) material areas, which, in Google's own words "... might potentially affect an individual's future joy, health, financial stability, or security." These are areas where Google is plainly worried about the quality of the responses they supply.
What about passage indexing?
Could this be tied to the "passage indexing" update that rolled out around February 10? While there's a lot we still don't know about the impact of that update, and while that upgrade impacted rankings and likely affected natural snippets of all types, there's no factor to think that upgrade would impact whether or not a Featured Bit is shown for any offered query. While the timelines overlap slightly, these events are most likely separate.
Is the bit sky falling?
While the 40% drop in Featured Snippets in MozCast seems real, the effect was mostly on much shorter, more competitive terms and particular industry categories. For those in YMYL categories, it certainly makes sense to examine the impact on your rankings and search traffic.
Generally speaking, this is a typical pattern with SERP features-- Google ramps them up gradually, then reaches a limit where quality starts to suffer, and then lowers the volume. As Google becomes more confident in the quality of their Featured Snippet algorithms, they might turn that volume back up. I certainly do not expect Featured Snippets to vanish at any time quickly, and they're still extremely widespread in longer, natural-language inquiries.
Consider, too, that a few of these Featured Bits may simply have been redundant. Prior to February 19, someone looking for "shared fund" might have seen this Included Snippet:.
Google is assuming a "What is/are ...?" question here, but "mutual fund" is an extremely ambiguous search that could have numerous intents. At the very same time, Google was currently revealing a Knowledge Chart entity in the right-hand column (on desktop), presumably from relied on sources:.
At the exact same time, while it might sting a bit to lose these Included Snippets, consider whether they were truly providing. In many cases, they might be leaping straight to the Knowledge Panel and not even taking the Included Bit into account.
For Moz Pro customers, bear in mind that you can easily track Included Bits from the "SERP Functions" page (under "Rankings" in the left-hand nav) and filter for keywords with Featured Snippets. You'll get a report something like this-- look for the scissors icon to see where Featured Snippets are appearing and whether you (blue) or a competitor (red) are catching them:.
Whatever the effect, https://jsbin.com/jumufodugo something remains true-- Google giveth and Google taketh away. Unlike losing a ranking or losing an Included Snippet to a rival, there's extremely little you can do to reverse this sort of sweeping modification. For websites in heavily-impacted verticals, we can only keep track of the scenario and attempt to evaluate our new truth.
Update: Visit word-count.
I understood that we could look at word-count in the STAT data to check the theory that shorter search questions (which are generally both more competitive and more unclear) were hit harder by this upgrade. Here's the breakdown of STAT's 2M desktop (en-US) keywords ...

