expression
you are cordially invited to participate; please come and join us
A polite, enthusiastic invitation phrase used in announcements, event flyers, or formal invitations. The adverb 奮って adds a sense of 'actively' or 'with enthusiasm'.
来月の勉強会に奮ってご参加ください。
Please come and join us for next month's study group.
皆様、奮ってご参加ください。
Everyone, you are cordially invited to participate.
A fixed polite expression combining the adverb 奮って (from the verb 奮う 'to stir up, to be enthusiastic') with the honorific request ご参加ください ('please participate').