Glossary
skipFeatureDeployment
skipFeatureDeployment is the setting in a SharePoint Framework package manifest that decides whether the solution is deployed once to the whole tenant (true) or has to be added site by site (false). It is the checkbox the App Catalog shows as “make this solution available to all sites”.
Set to true, it is mandatory for any solution exposing components in Microsoft Teams.
The common misreading: tenant-wide availability does not put anything on anyone's pages. A web part becomes available in the picker and renders nothing until a page author deliberately places it. Extensions are the exception — those do run automatically, which is why they deserve stricter review.