Aggregation types refer to the different methods used to combine data or information from various sources into a single, cohesive unit. Common types include sum, average, count, and max/min. Each type serves a specific purpose, such as providing a total value, determining a central tendency, or identifying the highest or lowest values in a dataset. In data analysis, choosing the appropriate aggregation type is crucial for accurate interpretation. For instance, using average can help understand typical values, while count can indicate the frequency of occurrences. Understanding these types aids in making informed decisions based on the aggregated data.