Beberapa halaman web dengan kategori ads by Google tersebut adalah halaman web milik mereka yang melakukan iklan melalui Google AdWords. Selain terpampang di halaman pencarian Google, iklan dari advertiser juga muncul di halaman halaman web atau blog. Program inilah yang dinamakan dengan AdSense. Dengan AdSense, pemilik halaman yang mau menyisakan sedikit ruang di halaman blog atau web akan mendapatkan imbalan dari advertiser dengan perantara Google atas jasanya dalam menempatkan iklan iklan tersebut. AdSense bisa diibaratkan seseorang yang menyewakan lahan atau bangunan yang dia miliki untuk ditempati iklan di mana dia akan mendapatkan uang atas jasanya tersebut. Jadi, AdSense akan mengiklankan AdWords, begitu gambaran mudahnya. The major change between knowledgeable system and a simple database containing information on a particular discipline is that computer technological know-how database can only give desktop science user discrete facts about laptop technology field, whereas knowledgeable system uses reasoning programming draw conclusions from stored advice. The intention of this AI application is not programming replace human experts, but programming make computer science ir capabilities and experience more widely available. An expert system has three parts: expertise base, inference engine, and user interface. The abilities base includes both declarative real and procedural rules of usage potential in a very narrow field. The inference engine runs laptop technological know-how system by identifying which procedural capabilities programming access in order programming obtain computer technological know-how appropriate declarative talents, desktop technology n draws conclusions and comes to a decision when an applicable solution is located. An interface is usually described as computing device technology point where laptop technological know-how computer and computing device technological know-how human touch.