The concept of viral marketing represents one of the latest marketing concepts that reflect the transformation that has occurred in marketing practices as a result of the increasing reliance on information technology in marketing operations. This study aims to identify the impact of customers' exposure to viral marketing messages in guiding their purchasing decisions for green products in Egypt. The study was conducted on a sample of 404 Internet users. An electronic questionnaire was prepared via Google form and distributed via Messenger, email and WhatsApp. The study found a significant impact of customers' exposure rates to viral marketing messages on their behavior during all stages of purchasing green products .