A routine General Motors' (GM) review of `how' and `where' the automaker spends its marketing dollars has, according to the information shared by GM spokesman Tom Henderson, prompted the bigwig auto company to decided against advertising on Facebook social network.

With the routine review apparently revealing that GM's $10 million annual spending on Facebook advertising was having hardly any impact on consumers, the automaker - which incidentally is the third-ranking advertiser in the US
- had decided to discontinue its Facebook ads.