If you mean organic traffic, most of it comes from search and suggested, not from people clicking random links. So the basics still matter a lot: titles that match what people actually search, decent thumbnails, and videos that keep people watching past the first 30–60 seconds. If your watch time is bad, YouTube just won’t push it, no matter how good your tags are.
Links and CTAs help once you already have views, but they don’t really create traffic by themselves. Description, pinned comment, end screens, all good, but they’re multipliers, not the engine.
For paid traffic, that’s just Google Ads with video campaigns, useful if you’re selling something or testing funnels, but it won’t magically grow a channel long term unless the content itself converts viewers into subs.
One thing beginners ignore is timing and competition. Posting when your niche audience is active and riding topics that already have demand is way easier than trying to force interest in something nobody’s searching for. Traffic on YouTube is less about tricks and more about giving the algorithm clear signals about who the video is for and keeping that audience watching. Once you do that, the rest gets a lot easier.