As mentioned, product comparisons are a big one but another worrying area is anything medical related.
I was trying to find research about a medicine I'm taking this week and the already SEO infested results of 5 years ago have become immeasurably worse, with 100s of pages of GPT generated spam trying to attract your click.
I ended up ditching search alltogether and ended up finding a semi-relevant paper on the nih.gov and going through the citations manually to trying and find information.