Decisions about choices and purchasing are heavily influenced by reviews be it leader opinions, discussions on social networks or views of friends and family. What's interesting is that those people may not be consumers but they have formed an opinion and communicated it based on exposure to ads or information about the product. This type of influence is only getting more powerful. This phenomenon lead to the review of the AIDA (Awareness, Interest, Desire, Action) model and the emergence of the AISAS (Attention, Interest, Search, Action, Share) model. Amongst the important metrics there are desire to learn more and desire to share. Those actions can be practised by people consuming information alone, they don't have to consume the actual product itself: "I saw a loan being advertised, which I don't personally need but my friend might. So I told him about it. The offer was too good to miss.".