Google Search Central: “…Hacked spam was still rampant in 2020 as the number of vulnerable web sites remained quite large, although we have improved our detection capability by more than 50% and removed most of the hacked spam from search results….Before we deliver a set of search results on Google, there’s a lot that happens behind the scenes. Every day, we’re discovering, crawling, and indexing billions of web pages. Among those pages is a lot of spam — every day, we discover 40 billion spammy pages. Here’s how we work to keep that spam from getting in the way of your search for helpful, useful information…”