It gives information that allows the reader to contextualize the news, they are useful for adding important details.

http://collaw.instructure.com/eportfolios/52364/David_50_Mg_Pt__Pfizer__Antidepressants
http://ocean.instructure.com/eportfolios/1273/Gp_Clen_Zlin_Vs__Geneza_Pharmaceuticals__Post_Cycle_Therapy

縺ゅ縺 メッセージ
Danish-born viticultural scientist arrives with strong accolades and a reputation for cosiness with China.