A post like "قوارب البطاطا هي حاجة لااازم تجربوها😍 Potato boats and frekeh for if..." earns its place on the board because it anchors the topic and creator story around it. A good post row is evidence for why a board segment looks the way it does.
The row shows the actual visible artifact behind a trend, not just the aggregate label. It is the board's proof layer.
If the same kind of post keeps reappearing across topic pages, the post layer may be the cleanest way to understand what is really driving the board.