I write my content on my own personal site. I automatically syndicate it to Facebook. My mom, who seems to be on Facebook 24/7, immediately clicks “like” on the post. The Facebook algorithm immediately thinks that because my mom liked it, it must be a family related piece of content–even if it’s obviously about theoretical math, a subject in which my mom has no interest or knowledge. (My mom has about 180 friends on Facebook; 45 of them overlap with mine and the vast majority of those are close family members).
The algorithm narrows the presentation of the content down to very close family. Then my mom’s sister sees it and clicks “like” moments later. Now Facebook’s algorithm has created a self-fulfilling prophesy and further narrows the audience of my post. As a result, my post gets no further exposure on Facebook other than perhaps five people–the circle of family that overlaps in all three of our social graphs. Naturally, none of these people love me enough to click “like” on random technical things I think are cool. I certainly couldn’t blame them for not liking these arcane topics, but shame on Facebook for torturing them for the exposure when I was originally targeting maybe 10 other colleagues to begin with.