The study investigates Jumia internet advertising and product patronage by Port Harcourt residents. The objectives of the study include; investigate the level of exposure of Port Harcourt residents to Jumia internet advertisement; identify the influence of internet advertising of Jumia products on Port Harcourt residents and to determine the challenges of Jumia internet advertisement and product patronage among Port Harcourt residents. The study was anchored on Uses and Gratification and Technological Determinism theories. It employs survey research design with the population of 3, 171, 000 and adopted Krejecie and Morgan (1970) sample size to select a sample size of 384 using the multi stage and purposive sampling technique with the questionnaire as the instrument of data collection. The study found that Port Harcourt residents are significantly exposed to Jumia internet advertising. Port Harcourt residents were influenced by discount and promise placed on Jumia products advertised online. The search for required products and payment of Jumia products as a result of network failure and the problem of internet connections were the major challenges of Jumia internet advertising and patronage of products among Port Harcourt residents. It concludes that internet advertising of Jumia products influenced Port Harcourt residents and recommends that Port Harcourt residents should compare the quality of other products in the market with that of Jumia products displayed for them online for exposure, influence and patronage.