The focus of this study was to examine the moderating effect of corporate websites on sales promotional strategies and marketing performance of fast-food firms in Port Harcourt Metropolis. The study adopted the cross-sectional survey research design. The population of the study comprises twenty fast food firms in Port Harcourt Metropolis. The study used a structured questionnaire instrument to collect data from the respondents. The study used the stepwise regressions to test the hypotheses. The findings of the study revealed that: corporate websites strongly moderate between promotional strategies and marketing performance of fast-food firms in Port Harcourt. The study recommends that fast food firms should constantly develop and keep updating their corporate websites as it has a significant effect on the perception of customers about the firms. It also serves as a conduit to better inform prospective customers and existing customers about the brand.