Google Search

Read The Man Who Killed Google Search article.

TL;DR

The internal pressure from the Ad team to increase revenue forced the team search to make some changes to "increase engagement":

When it launched, many found that the update mostly rolled back changes, and traffic was increasing to sites that had previously been suppressed by Google Search’s “Penguin” update from 2012 that specifically targeted spammy search results, as well as those hit by an update from an August 1, 2018