A brochure must talk everything about your company: it's goals, it's products, it's effectiveness, it's need, and so on. Hence, selection of a brochure design would affect your revenue considerably. The level of professionalism and eagerness you would be able to evoke amongst consumers would determine the success of your company.
Content of your brochure would talk about the purpose of designing a brochure. Are you introducing a new offer? Or are you promoting your new service? You don't know how many readers will receive your brochure, let alone reading it. However, to make sure the people who get your brochure would read the content, displaying the message very clearly, and effectively is quite significant.
Format is as important as the content of your brochure. The content you would enter in your brochure would vary according to the size and shape of the brochure.
Image on your brochure would talk more than the actual content. Hence, selection of images should be done considering various things in mind including the intended message and the values of the readers.
If you have specific feel or look of the brochure in mind, let us know before we start designing it. The content, images, and format would depend on the design of your brochure. Hence, designing it would affect all the above elements.