Brackets

-What does it do?

We typically use square brackets when we want to modify another person's words.

-When do we use it?

To add clarification; to add information; To add missing words; To add editorial or authorial comment; to modify a direct quotation.

Examples:

1: "He [the policeman] hit me!"

2: The two teams in the finals of the first FIFA Football World Cup were both from South America [Uruguay and Argentina].

3: The ice cream truck man drove by my house today; he had big, hairy knuckles