As an awareness type of campaign, the purpose of banners is to make your company, brand and products massively known.
Although banners are not a direct lead source, they highly influence the lead generation process. To decide to select your products, your potential buyers need to be well familiar with your brand, and the banners contribute to making it stay on top of their mind.
Pro Tip: If you want to learn more about how banners contribute to lead generation, read our blog article.