In the rapidly expanding world of e-commerce, avoiding common pitfalls is crucial for maintaining and boosting online sales. Key issues that can negatively impact sales include performance problems due to incorrect coding, lack of support for mobile devices and multiple browsers, and limited payment options, which can frustrate customers during their shopping experience. Poor product descriptions and return policies can deter potential buyers, while a lack of mobile applications can limit accessibility. Effective marketing strategies, particularly on social media, and a keen awareness of competitors' strategies are essential for staying competitive. Additionally, a streamlined checkout process, avoiding mandatory registration, transparency about costs, and a robust search feature are vital for enhancing customer satisfaction and retention. Ensuring these elements are addressed through thorough functionality and usability testing is essential for the success of an e-commerce platform.