Doorway pages, which are also known as gateway pages, portal pages or entry pages, are created exclusively to improve ranking in the SERPs. They do not contain quality content, relevant information and have a lot of keywords and links. They are created to funnel visitors into the actual, usable or relevant portion of your site. A doorway page acts as a door between the users and your main page. Black hat SEO professionals use doorway pages to improve the ranking of a website for specific search queries or keywords.