Conversation so far:
What was the economy like?
Gaelic Ireland was involved in trade with Britain and mainland Europe from ancient times, and this trade increased over the centuries.
Are there any other interesting aspects about this article?
There are many passages in early Irish literature that mention luxury items imported from foreign lands, and the fair of Carman in Leinster.
What kind of items?
In the Middle Ages the main exports were textiles such as wool and linen while the main imports were luxury items.
What else did Gaelic Ireland consist of?
Money was seldom used in Gaelic society; instead, goods and services were usually exchanged for other goods and services.
Where did the exchange happen at?
The economy was mainly a pastoral one, based on livestock (cows, sheep, pigs, goats, etc.) and their products.
What else happen with the economy?
Cattle was "the main element in the Irish pastoral economy" and the main form of wealth, providing milk, butter, cheese, meat, fat, hides, and so forth.

Question: what did they do with the items?
Self-contained rewrite: What did people in Gaelic Ireland do with the products from cattle?