Marufi shine farkon abin da mabukaci ke so yayin da suka sadu da wani samfuri.Masu amfani da kayan bawai kawai suna bukatar samun bayanai bane game da kayan, amma kuma suna bukatar samun karin karfin gwiwa a yayin sayen kayan.
Bankaji yana da farkon fassarar masu amfani da idan sun haɗu da alama. Mai yiwuwa ba ya kasa amfani da shi kawai, kuma amma ana ƙayyade a sami-musamman masu ƙaranci idan za'a sayin alama<br>