Personalized ads (formerly known as
Google AdSense by default serve ads based on your visitor's browsing history that
A niche with high competition in
Google AdWords (where there are a lot advertisers bid for keywords in your site) would benefit from disabling the option, while site's with less targeted keyword might suffer.
Follow these steps to disable
Personalized ads for your
Sign up for Ultimate Autopilot Google Adsense Method - Free Traffic and many other great courses on Udemy to learn more.