For example:
* Original: "I love chocolate," she said.
* With brackets: She said, "I love [dark] chocolate."
This makes it clear that she specifically loves dark chocolate, not all chocolate.
You can also use brackets to add clarifying words or phrases:
* Original: "I'm going to the store," he said.
* With brackets: "I'm going to the store [to buy milk]," he said.
This adds context and clarifies what he's going to the store for.