Conversation so far:
What is the joglars?
a distinction was definitely being made between an inventor of original verse and the performers of others'.
These last were called joglars.
Are there any other interesting aspects about this article?
joglar was a courtly entertainer (as opposed to popular or low-class one) and a troubadour was a poet and composer.
WHo used them?
CANNOTANSWER.
can you tell more more about what role the joglars payed?
They often performed the troubadour's songs: singing, playing instruments, dancing, and even doing acrobatics.
were they paid?
CANNOTANSWER.
What role did the trobadors play?
noted, many troubadours were also known as jongleurs, either before they began composing or alongside.

Question: What were they know to compose?
Self-contained rewrite: did joglars know how  to compose?