Not yet sure what a marketing retainer means? Look at this example True Co. Suggestion to retainer marketing! A typical advertising agency agreement stipulates that the client retains the services of the advertising agency. It outlines its creative work requirements, the products and services to be provided, as well as the support of advertising. This section may also include the client`s advertising objectives and other additional services such as public relations and market research. Whether you`re using a professional service for the administrative parts of your freelance business or creating your own model, there are 9 important points you should know through your PDF agency contract file. That`s why True Co. created this ultimate guide for marketing agencies. We answer all your questions about marketing retainers so you can be sure you can decide if a retainer is the marketing solution you were looking for. Please indicate your agency`s terms and conditions of engagement. Keep in mind that your agency cannot charge a fee for late payments and interest if you haven`t added the necessary clauses. Each agency must have devised its own conditions for a successful consulting career.