Sometimes you may need to use a strong quote which does not actually contain all the information your reader needs to make sense of the sentence. This can happen because the person is speaking about something he or she does not mention in the actual quote itself. In such cases you can insert the missing fact - often a name or a title - in square brackets - within the quote to show what you have done For example, the Finance Minister might be speaking in Parliament about the May Budget but did not use the actual title in the sentence you want to quote:
Besides setting off other people’s words, quotation marks have a couple of other uses. Depending on the style guide you’re using, you might use quotation marks to emphasize titles of all types of compositions (AP Stylebook), or just short compositions (most of the other style guides). Titles of books, albums, magazines, newspapers, and other standalone and bigger bodies of work are usually italicized. Poems, chapters, articles—smaller bodies of work, or bodies of work which form a larger body of work—are emphasized by using quotation marks.