General Usage:
* The protesters marched down the street, carrying placards with slogans denouncing the new policy.
* The museum had a placard next to the painting, providing information about the artist and its history.
* The candidate held up a placard with their campaign slogan as they addressed the crowd.
More Specific Examples:
* The placard on the door read "Closed for lunch, reopen at 1:00 PM."
* The street vendor displayed a colorful placard advertising their fresh produce.
* The student union organized a demonstration, distributing placards with messages about climate change.
Remember, a placard is a sign or board used for displaying notices or messages, often held up or displayed publicly.