Connectors: bring in a tool you already use — Watching it run
Progress shows live on the connection itself: what the run is doing right now (“Importing Orders…”) and how many records have landed, updating as it goes, then finally ok, partial or failed with a record count and a timestamp. You can leave the page — the import runs in the background regardless.
partial means it finished and recorded warnings — usually fields that couldn't come across as themselves, or a page of records the vendor stopped serving. The first few are listed with a count of the rest, and running the import again picks up what a partial run missed.