At it’s core, Reformed Theology is biblical Christianity. A closer examination shows that Reformed Theology is the belief or set of doctrines that was brought about by the Protestant Reformation that seeks to glorify God in His character, establish the exclusive authority of His word, and in His salvation by grace alone, through faith alone, in the merits of Christ alone.
Some examples of the aforementioned doctrines include the Five Solas, the Doctrines of Grace (AKA, T.U.L.I.P. or 5 Points of Calvinism), and several Confessionals.
For a more in depth answer, please check out the resources linked below.
Further Resources
https://www.ligonier.org/learn/series/what-is-reformed-theology
https://www.ligonier.org/store/what-is-reformed-theology-paperback
https://www.ligonier.org/learn/collections/new-to-reformed-theology-collection
https://www.rca.org/about/theology/
