Paid Search

paid search, also known as sponsored search. As its name implies, paid searches are advertisements in which the sponsor pays for placement at either the top of a search engine results page or as a separate ad, generally placed to the side of organic or natural search results.

參考來源：

"paid search, also known as sponsored search. As its name implies, paid searches are advertisements in which the sponsor pays for placement at either the top of a search engine results page or as a separate ad, generally placed to the side of organic or natural search results."
- What is Paid Search? (在「Google 網頁註解」中檢視)