A dataset is a collection of related data points organized in a structured format, often in tables or spreadsheets. Each row typically represents a single observation or record, while each column contains a specific attribute or feature of that observation. Datasets can be used for various purposes, including analysis, research, and machine learning. Datasets can come from various sources, such as surveys, experiments, or online databases. They can be small, containing just a few entries, or large, with millions of records. Common types of datasets include text datasets, image datasets, and time series datasets, each serving different analytical needs.