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I agree to Ajay, some additions:-
CSR or social marketing works for a known organisation, it is practised by well-established org. only. CSR for newly born org. is of no value except for NGOs working with Govt. collaboration towards a social cause. 1-This takes a hell lot of investment to practise CSR.
2-The ROI is not visible in short run,but brings in Cash inflow & Goodwill in the market in long-run.
3- Example: TATA,Idea ,Aircel(Save our tiger campaign,1411 magic no.)
4-CSR doesnot indicate responsibility towards society to knowledgable persons but sends + impression to common man & brings business in form of Goodwill & brand image.
5-So NEVER get immotional next time you come across such campaign,it is a marketing tool ONLY.