So many possibilities, all custom made!
Lawn signs (also known as yard signs, bandit signs, placards, and road signs, among other names) are used for local advertising. They can be used by business such as real estate and are popular in election campaigns. They are small signs that can be placed on the property of a business or residence (or as shown, can be used on a golf course for golf tournaments).
They are often made of coroplast which is a light-weight, non-toxic, waterproof, shockproof, long lifespan, corrosion preventive material.