What are print on demand printing companies?
Print on demand companies print books as orders arrive instead of requiring an author to buy hundreds or thousands of copies upfront. For self-publishers, that usually means lower inventory risk, easier revisions, and simpler fulfillment.
The tradeoff is that unit cost is usually higher than large offset print runs. POD is excellent for testing, online retail, author copies, and steady sales. Offset may make sense later for events or bulk direct sales.