Subscriber count is the number every new visitor sees first, but it isn't the metric that decides whether YouTube keeps recommending a channel's videos.
What subscriber count is actually for
A healthy subscriber count works as social proof, the same way a follower count does anywhere else — it tells a new visitor other people already found the channel worth sticking around for. It does very little on its own to get a video recommended to someone who isn't subscribed yet.
What actually drives recommendations
Watch time and click-through rate carry far more weight. A video that keeps people watching past the first 30 seconds, and that gets clicked when it's shown as a suggestion, tells YouTube's system to keep surfacing it — regardless of how many subscribers the channel has.
The practical order of priorities
Views and watch time on individual videos move the needle on discovery. Subscribers move the needle on trust once someone lands on the channel. Building both in parallel, rather than fixating on subscriber count alone, is what actually compounds over time.
