If your asking about earning money for writing in HubPages. Answer is, HubPages does not directly pay you for your writing. You should have affliate account of Google adsense, Kontera, Ebay or Amazon.
HubPages show your ads from those affliate programs in your hubs (articles). When somebody click (Adsense & Kontera) you will get money from those programs or when someone purchase something from your links (Amazon or Ebay) you will get your commision from those programs. If you do not have your own IDs for above programs, then you should first signup for those if you want to earn. Hope this answer would help you.