Co-writing means sitting in a room with a songwriter (or remotely via session) and building a song together. You share the publishing split — typically 50/50. You own half the composition outright. This is the traditional Nashville model.
The downsides: it takes time, it requires chemistry with the other writer, and the publishing deal needs to be clearly agreed upon upfront. Great co-writes can take dozens of sessions to find.
Exclusive licensing is different. You acquire a finished, professionally produced song outright. No split, no negotiation on publishing terms — the track is yours to record and release commercially. The original writer retains the underlying composition copyright, but you own the commercial recording rights entirely.
For artists who are strong performers but not yet comfortable in the writing room, licensing is often the faster path to releasing quality original material that fits their voice and image.