When fine-tuning paid search ads, you change a broad-match keyword to a phrase-match keyword using which symbol

quotation marks

Broad-match keyboard shows the typed words given not necessarily in the same order while Phrase-match keyboard searches for the words in the same order searched. The phrase can be embraced using quotation marks. A few words may be included preceding or following the phrase.

that without the operating systems you would have to control and synchronize computer hardware.