Steampunk is usually set in an alternate Victorian or fin de siecle world, incorporating both magic and anachronistic technology such as steam engines and clockwork devices. Steampunk often explores "what if" scenarios about the effect of steam-based technologies on history. It often features stories of hidden or alternate history. In the latter case, steampunk is closely related to the alternate history subgenre.
Modern steampunk is heavily influenced by the work of Jules Verne and H.G. Wells. An iconic steampunk title is The Difference Engine (1990) by William Gibson and Bruce Sterling.
If you write steampunk, explore the subgenre to connect with other like-minded writers, workshop, and publish your book.