The requests presented so far contain only one operation. Product Advertising API enables you to improve performance by submitting more than one request at the
same time. There are three ways to do this:
Batch request—A request that uses one
operation with up to two sets of parameters.
Multiple operations request—A request
contains more than one operation. This kind of request can combine simple and
batch requests.
Multiple ItemIds—In an
ItemLookup request, you can include up to ten
comma-separated values for ItemId.