Thread:Love Robin/@comment-4708882-20180518225407

Apparently the official site and some others actions consider it part of the Arrowverse as at this point it seems confirmed to be of the same multiverse which all them have been exploring to make clear they all are connected. While some debate has existed at the start due to another network owning Supergirl that has since been changed. Arrowverse is basically the shows considered part of The Flash's multiverse introduced and incorporated into the series.

Here's a link to the office site: Arrowverse, officially the shows so far include: Arrow, The Flash, Constantine, Supergirl and DC's Legends of Tomorrow. 