Throughout the Jetpack UI (especially in Settings), we have (i) icons everywhere to give some more information about what each feature is. In every case, they just say "Learn More" and link off to a support doc.

In most cases, we should have a brief message in the tooltip that appears, which might provide enough context for people. Then we can still include the "Learn More" if they'd like to get more details.

They should also probably include an icon/indication that they load in a new window.