Aggregator
also bundle merger
A module that combines multiple separate items back into a single structure, such as one array, text string, or numeric total.
Analogy
Like gathering loose pages back into one stapled document.
Why it matters
Aggregators let you collect results from a loop or multiple items into one payload before sending it onward.
In practice
A Make aggregator merges many line items into a single array to post in one API call.