The goal isn't views, likes, comments, or even email subscribers.
The goal is to help people. Earn the trust needed to make the sale.
A hundred emails or a thousand clicks from people who dont use your advice in some way is less valuable than 5 emails of people whose day you measurably changed.
And truthfully, useful; is shareable.
Yes, shareable means you can share... but for what reason...
Useful actually is a reason to share. It's more concrete. dare I say: Actionable.