SOPA or Stop Online Piracy Act is a bill proposed in the US. This bill seems to want to fight online trafficking of copyrighted intellectual property.
The perceived benefit is to the holder of the rights to the intellectual property for other people cannot take their assets and use them for their own benefits. However, with such a major bill, other impacts has to be taken into consideration. Would others be disadvantaged by its restrictions and cause major costs for the online companies to be passed on to the consumers? Maybe it might be the case.
Overall, I believe that SOPA is not the way to go about the issue. It is almost like having a closed door policy and make the country lose its competitive edge.