A doorway page is a web page created specifically to rank highly in search engine results and funnel visitors to a main site or affiliate offer. In search engine marketing (SEM), doorway pages enhance visibility by targeting specific keywords and locations, increasing the likelihood of capturing targeted traffic. These pages are often optimized to appeal to search engines, leading users to relevant affiliate offers upon entry. By directing users through tailored content, marketers can increase click-through rates and conversions. However, doorway pages must be used carefully, as search engines like Google penalize manipulative practices. When ethically implemented, doorway pages can support a broader SEM strategy by aligning search intent with affiliate promotions, ultimately boosting campaign effectiveness and return on investment.