Followers
Attached to the profile, which on Pinterest is visited far less than the pins themselves.
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Pinterest behaves less like a feed and more like a search engine, which changes what the numbers are worth. Each service below has its own page with the current packages, rate and delivery window.
Pinterest is the platform in this catalogue that behaves least like a social network. People arrive at a pin through search and through the related-pins rail far more often than through a profile they follow, and a pin keeps surfacing for months or years after it was published. That long tail is the whole reason Pinterest is worth working on at all.
It also changes what the two numbers here mean. A like on a pin is a signal attached to that pin, and the pin is the thing that travels. A follower is attached to the profile, and on Pinterest the profile is visited far less than on any other platform here.
So the order of operations is different from Instagram or TikTok. If your goal is that a specific pin gets seen, the order goes on the pin. If your goal is that a profile reads as established when somebody does open it, the order goes on the profile.
Both are placed against a public link and nothing else. A secret board cannot receive an order, because a pin inside one is not reachable from outside your account, and there is nothing public to deliver against.