* Direct speech: Quotation marks are used to enclose the words of a speaker when they are quoted directly. For example, "I am the captain now," said the first mate.
* Sarcasm or irony: Quotation marks can be used to indicate sarcasm or irony. For example, "Sure, I'm fine," said the student sarcastically.
* Emphasis or importance: Quotation marks can be used to emphasize or highlight a word or phrase. For example, "We need to think 'outside the box'" said the CEO.
* Technical or specialized terms: Quotation marks are often used to enclose technical or specialized terms that may be unfamiliar to the general public. For example, "The 'algorithm' used in this software is incredibly efficient."
* Titles or nicknames: Quotation marks can enclose titles or nicknames, like the "Rocky Mountains" and the "Mandela Effect".