Have you recently visited a website to take a quick look at something and then got bombarded with ads from that company anywhere you go? Advertisers who use the Google Ads platform can track you on Google, YouTube, and any of their ad partners through apps and websites.
You can control this through Google Ad personalization by clicking on this link (requires you to be logged into your Google account):
You will likely have an Aha moment upon clicking on this link and recognizing many of the advertisers that have been tracking you. There you have the ability to turn off many of the advertisers if they aren’t relevant to what you search for online.