That’s Google AdSense working as intended. By correlating what you search, the advertisers have a more effective return from with these reminder ads versus if they were running ads for anyone/everyone.
Amazon’s “recommendations” largely work the same – which is why they were suggesting me
office chairs bobcats a little while back. Granted, all those suggestions were horrible as it didn’t take any consideration of my less-than-the-price-of-one-catshirt budget.
Currently, my recommendations include SSDs, networking equipment, and cat toys.