Comments are the loudest proof that a video has an audience. A view count tells someone people clicked, but a comment section tells them people cared enough to stop and say something. When a new viewer sees an active discussion under a video, they read it as a place worth their attention, and they are far more likely to watch to the end and join in themselves.
That activity also moves the algorithm. Comments are one of the strongest engagement signals YouTube tracks, because they take real effort compared to a passive view. A video collecting them looks alive to the system, which makes YouTube more willing to keep showing it in search and suggested. An empty comment section does the opposite, it signals a video nobody felt anything about.
We deliver relevant, natural-reading comments paced like a real conversation building over time, never a wall of identical lines dropped at once. They look like genuine viewer reactions, so the section reads as authentic to YouTube and to everyone scrolling it. Seed that early activity and real viewers are much more comfortable adding their own.