Connector
A sign-in link between a Base44 app and an account on another service, like Gmail or Slack, so the app can act there.
A connector gets your app into another service without API keys pasted everywhere. You click connect, sign in, approve what it's allowed to do, and Base44 keeps the token.
The real decision is whose account it is. A shared connector is one account for the whole app, like the team Slack. An app user connector lets each person connect their own, which is what you want the moment it's somebody's inbox or calendar. App user connectors also need your own OAuth app details, so decide early.
Some connected tools can start a workflow as well: a new email landing in Gmail, say, or an event changing in Google Calendar.
Ask for the smallest set of permissions the job needs. People do read that consent screen, and a scary one gets closed.
Related:Workflow, Integration and Superagent.
Where I've used it: