Aggregation is the process of combining multiple items or data points into a single group or summary. This can be seen in various fields, such as in data analysis, where individual data points are collected to create an overall picture. For example, a company might aggregate sales data from different stores to understand total revenue and identify trends. In everyday life, aggregation can also refer to gathering items together, like collecting sports cards or stamps. When enthusiasts aggregate their collections, they can appreciate the variety and value of their items as a whole, rather than just focusing on individual pieces.