Q: In ramadaan they do salattul tasbeeh in jamaat and the imaam encourages us to join. Is this a sunnah? Bidah? Wajib? Is salatul tasbeeh in religion or just something people do?
A: To do it in group form and encouraging people to do in such a manner is not correct. Salat ul tasbeeh should be encouraged and done by a person at least once in their life. It should be done individually.
Rasulullah (SAW) educated Sayidinah Abbas (RA) regarding its significance, therefore it is part of sunnah.
Allah Certainly Knows Best.