Description: Training data bias refers to the presence of systematic errors in the datasets used to train artificial intelligence (AI) models. These biases can arise from various sources, such as data selection, unequal representation of demographic groups, or the inclusion of irrelevant information. As a result, AI models may learn distorted patterns that reflect existing societal prejudices, leading to unfair or discriminatory decisions. This phenomenon is particularly concerning in critical applications, such as hiring, criminal justice, and healthcare, where biased outcomes can have significant consequences for affected individuals. Identifying and mitigating bias in training data is a crucial challenge in developing ethical and responsible AI systems. As AI becomes more integrated into everyday life, awareness of data bias has increased, prompting researchers and developers to adopt more rigorous practices in data collection and management. Transparency in training processes and diversity in datasets are essential steps to address this issue and ensure that AI models operate fairly and equitably.