The impact of marketing on banks' products and services in Nigeria was studied by looking at three major banks. The researchers found that effective marketing strategies are crucial for banks to offer competitive products, keep customers loyal, and maintain a positive image. Customers were satisfied with the quality and timeliness of services provided by the banks. It was also noted that customers use a product or service because it meets their needs or provides a benefit. To improve customer satisfaction, banks should prioritize customer service and have well-trained staff to address any issues.