What is the main purpose of aggregating functions in an aggregate?

The main purpose of aggregating functions in an aggregate is to summarize data from the source entities. Aggregating functions, such as COUNT, SUM, AVG, MIN, and MAX, are applied to sets of data in order to compute a single value that reflects some characteristic of that data. For example, using an aggregation function like SUM can provide the total of a numeric field across multiple records, while COUNT can give the number of records that meet certain criteria.

This summarization is particularly useful when you want to extract meaningful insights from larger datasets, as it condenses information into a digestible format. Thus, the primary role of aggregation is to enable effective data analysis by summarizing and revealing important metrics from the data you're working with.