The obvious reason is that your friends are searching for things. When you talk to your friends and your friend mentions that he&#x27;s going through a divorce, the odds are great that he&#x27;s looked up a divorce lawyer online, because you&#x27;re friends, FB figures you&#x27;d be interested in the same thing and starts serving you ads for divorce attorneys.<p>Or if your friend is renovating his house and does a search for new cabinets, you&#x27;ll see cabinets show up in your ads. And you won&#x27;t think anything about it until you talk to your friend about his renovations. Then you get home, and your FB is full of renovation ads.<p>Never attribute to malice or competence (voice fingerprinting for ad targeting )what can adequately be explained by a stupid algorithm (&quot;my friends and I must like the same things&quot; ad targeting).