👉 Dimensionality is a measure of how many features or dimensions are necessary to describe a particular object, process, or phenomenon. In data science and machine learning, it refers to the number of independent variables required to predict the outcome variable with high accuracy. For example, if you have a dataset that contains information about customers' purchase history, it would be considered as having 10 dimensions (features) because each customer has at least one feature such as age, gender, income, etc. In machine
