A broad core algorithm update is a change to Google’s “core,” or overall,
search ranking algorithm and systems. Google's core algorithm is actually
a set of algorithms that read signals from webpages (such as keywords, links,
and other factors) in order to rank the material that best answers a search term.
When Google announces a core algorithm update, it's feasible that they're
modifying more about Panda, Penguin, both, or both and more. Since we all know,
Google keeps as little information about their secret ranking formula as possible.
Google's Gary Illyes has stated that the company uses "possibly millions" of baby
algorithms that look at various signals in addition to the primary algorithm. Although
there has been much speculation regarding what a "baby" or "small" algorithm is,
all Illyes said is that they can create a surge in crawl rate and check for specific
signals in pages and content.
To put it into perspective, core updates account for only three of the hundreds of
changes Google makes to its core algorithm each year. Google will make 4,500 modifications
to searches in 2020, an average of more than 12 each day. In 2018, there have been 3,200 of them.
In addition, Google conducted over 600,000 trials in 2020. That's a lot of tweaks and trials,
all of which can have an impact on SERP visibility, traffic, and ranking. This doesn't account
for what your search competitors are doing, as well as other factors such as seasonality,
news or issues that cause search, and so on.
Reference :https://searchengineland.com/
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