Workshops generally specify their events using the schedule editor or importing events using cmt or openreview. In addition a workshop may desire to upload posters and thumbnails for individual poster events in order to support a virtual poster session, or simply to allow authors to have their posters available on the conference website.
One of the primary goals of academic conferences is to present papers. Two different kinds of conference events support this. One is a Poster event where an author may present their paper via a poster and the other is either an Oral or Spotlight event where an author may give a talk about their paper (this presentation may have other names as well including simply "talk"). It is not unusual for conferences or workshops to have papers which have both an Oral presentation and a Poster presentation. The best way to handle this is to create two events in the conference for each of these events. The CMT or OpenReview Import process supports creating multiple events from a single imported paper. Workshop organizers may also create multiple events in the schedule editor for a single paper. Often there is a one to one relationship between papers and posters, so casually these two terms may be interchanged but be aware that this may be confusing for some people as they really are different particularly when a paper has more than one event.
To identify a Poster event for a workshop the type of the event must be Poster. This is required in order for poster events to show up in the Poster Upload Page and for the poster event to be added to a virtual poster session (e.g. Topia Poster Session).
There are fewer restrictions on the type of a talk presentation for a workshop. These may be Oral, Spotlight or some other kind of presentation type.