What is the Google algorithm?

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And although it's been around for 8 years, the reality is that it's only become more strict in recent years regarding the quality of your website's links.

But check this dreaded algorithm.
Your website's interlinking, that is, how you direct traffic to your website and whether these links are generating traffic and directing your users through your website.
Follow and do-follow links from your website to other pages, which generate traffic to other sites such as sources, add-ons to your website, or anything that helps your user benefit from the information on your page. It also demonstrates that you also provide page rank to other websites.
External links to your website, here this algorithm will check the way you created these links, it will also review behavioral patterns, these patterns determine if your link creation was created naturally (normally they do not show logic) or home owner database if they were purchased, the companies from which links are purchased, no matter how much they say they are manual, obey certain patterns for the generation of them.
If the links are purchased, sooner or later your website will be penalized. It should be noted that the last two updates, the one in June 2019, were 70% to this algorithm and the one in May 2020 was also largely to the Penguin.

If you check out forums about these updates, you'll know that they affected thousands of blogging platforms that generate revenue through Adsense.
And the fact is that buying links is still considered by some pseudo SEO specialists as part of positioning, but sooner or later they take their toll.

According to Google's guidelines, Penguin will remain the most up-to-date algorithm for at least the next two years, so instead of tricking Google, try convincing it of what you're doing.

Penguin, the terrible Google algorithm
Pirate (Google Pirate) 2012
As its name suggests, this algorithm penalizes pages that infringe copyrights—not duplicate content, but pirated content, books, movies, TV shows, and more.