I don&#x27;t use Facebook. But I&#x27;m noticing these trends elsewhere - in online Ads. I was browsing for &quot;interesting things&quot; on Amazon recently, one such thing was a hand powered torch light. It was interesting because it recharged via mechanical energy but I knew that the dynamo would be crappy and it would stop working after a couple of days. So just left it there.<p>Then, magically, when I was reading a blog which had Google Ads in it, I saw an Ad on the right which showed &quot;Hand-pump based rechargeable batteries&quot; and I was like &quot;That&#x27;s so cool! I want to buy it&quot;, then realized how Google&#x27;s algorithm was influencing me to buy things that I didn&#x27;t even know existed.<p>Somehow Google was able to make out that I&#x27;m interested in things that are hand-powered. I&#x27;d like to think it was random, but I know that&#x27;s not the case.