A-frame signs, also known as sandwich boards, are portable advertising displays that consist of two connected panels. They are typically made from materials like wood, plastic, or metal and can be easily set up and taken down. These signs are often used by businesses to promote sales, events, or special offers, making them a popular choice for restaurants, retail stores, and outdoor markets. The design of A-frame signs allows them to stand freely on sidewalks or in front of buildings, attracting the attention of passersby. Many A-frame signs feature chalkboards or printed graphics, enabling businesses to customize their messages. Their versatility and ease of use make them an effective marketing tool for various industries.