Co-advertising, also known as cooperative advertising, is a marketing strategy in which two or more companies collaborate to promote a product or service. This type of advertising allows businesses to pool their resources and reach a larger audience, while sharing the costs and risks associated with traditional advertising methods. Co-advertising can take various forms, such as joint commercials, cross-promotional campaigns, or co-branded events. It is a mutually beneficial partnership that not only increases brand awareness and sales, but also fosters a sense of community and trust among the collaborating companies.