In the arena of marketing, a good visual always attracts more attention than a well made set of words. That’s exactly why banners are used everywhere on the web. However, like any advertisement, a banner has to be in the correct place at the right moment to have the needed effect.
It is generally smart to outsource the activity of banner advertising to a company that specializes in the same. These companies not only develop custom banners for you, but also direct you on the banner sizes and positions that would yield the best results.
These enterprises understand the cost of online real estate, and can estimate the banner sizes required to attract attention while reducing costs. It is a cheaper option to hiring your own internal marketing and graphics design divisions.